I'm thinking that this has something to do with the commercials that are being played from the FNC stream. That's just me though. I've tried paying attention to see if it happens only after a certain commercial but I keep getting distracted 
I've thought the same and I've tried to track to see if it happens on the same commercial. Unfortunately, I have trouble remembering which it is as well. To be honest, with over 100 occurrences in the last month I think I'd remember by now if it is a particular commercial so I kind of doubt that it is.
The one common behavior I've recognized is that the stream pauses for 2-3 seconds before before reverting to the timeline. But, I don't think that tells a whole lot as it's probably just the player encountering the 403.
The really odd thing is that it's been a couple of days with no occurrences and then today it happened again.
My suggestion is this whole topic be moved to Channels DVR TV Everywhere
With a thread Fox Networks (and whatever the issue is).
These type of issues appear to be specific to a TVE Network (ex:Fox), not a specific TVE channel.
The Network (ex:Fox) uses a CDN (Content Delivery Network) Provider to stream their content to you.
It doesn't matter who your TV provider is that you login with.
FNC and FBN and other Fox Network channels appear to be having issues.
Would assume they are overloaded with streams and their akamai CDN servers are having issues, not a Channels TVE DVR issue.
Anyone else having issues with Fox Network channels (I don't know as I don't watch or record any of them)?
I'm on the latest update and was testing out Fox New Channel. It just locked up 3 minutes to 6pm PDT. The lock up occurred right at the end of a Susan G Komen ad. Don't know if that helps.
Sounds like the devs are on it.
Let me know if you want me to email any logs to support and if so, which ones.
Deleted my recordings and logs as posted since no requests for them since my post on 9/15
Here's an occurrence from last night. If it helps any it happened at the end of the YMCA commercial.
2019/09/17 21:50:08 [ERR] Error during stream TVE-sony_auth-gateway_net ch6073 FNC: Failed to download file: https://x-live-fox-stgec.uplynk.com/ausc/slices/afd/4f59ea65df184a2580ad8fc80d3eaa32/afd76bf662454d8b870fd07499a57c8f/H0000000F.ts?pbs=b01c03073ba344a7a0b8ecd2a6aed2dc&_jt=l&chid=1e298c9d65a245b3bd37f339cadcca58&oid=5b6fd7c6528d417e8bdad7f79754bb9e&si=28: 403 Forbidden
Are you still seeing better ads than before?
The new errors seem to be from a different host name which is a good sign. Are they still happening less often? Is there a pattern to how long after you start streaming when the error occurs?
I can corroborate that the YMCA ad will cause a lock up as will the Susan G Komen ad. I guess it's dependent on when you start watching and when they play the add as you can go an hour or 2 without an issue. I haven't paid attention to whether or not the system stays up after one of those 2 ads has played or if it happens every time they are played. I'll try to pay attention to that. Here's the log from around lunch today. I had to leave the office so I decided to start the stream and see how long it would last.
2019/09/18 11:30:00 [TNR] Opened connection to TVE-DTV for ch6073 FNC
2019/09/18 11:30:01 [HLS] Probed live stream in 687.084204ms: h264 1280x720 progressive 6233043bps
2019/09/18 11:30:01 [HLS] Starting transcoder for channel 6073 from 69.75.161.146 (encoder=h264_videotoolbox, resolution=720, deinterlacer=blend, bitrate=4000)
[h264_videotoolbox @ 0x7ffc96821400] Color range not set for yuv420p. Using MPEG range.
2019/09/18 11:30:13 [HLS] Stopping inactive session ch6051-dANY-07aedeb83a52 @ 2h44m57.528867s
[h264 @ 0x7f974382ce00] error while decoding MB 55 66, bytestream -6
2019/09/18 11:30:13 [TNR] Closed connection to TVE-DTV for ch6051 CNBC
[aac @ 0x7ffc9688f000] env_facs_q 252 is invalid
2019/09/18 11:38:15 [NAT] Successfully mapped port 8089 using natpmp
[aac @ 0x7ffc9688f000] env_facs_q 255 is invalid
2019/09/18 12:17:22 [ERR] Error during stream TVE-DTV ch6073 FNC: Failed to download file: https://x-live-fox-stgec.uplynk.com/ausc/slices/afd/4f59ea65df184a2580ad8fc80d3eaa32/afd76bf662454d8b870fd07499a57c8f/H0000000F.ts?pbs=3f7e125750f842fca4cc4ec07e4a5e5e&_jt=l&chid=1e298c9d65a245b3bd37f339cadcca58&oid=5b6fd7c6528d417e8bdad7f79754bb9e&si=33: 403 Forbidden
Last message repeated 2 times
2019/09/18 12:17:27 [HLS] Stopping transcoder session ch6073-dANY-07aedeb83a52 @ 47m10.439833s
2019/09/18 12:17:27 [TNR] Closed connection to TVE-DTV for ch6073 FNC
I am still receiving regular commercials and the error does seem to happen less often than before. I think it’s happened 3 times in the last 2 days vs 3-4 before.
The ads for YMCA and Komen run fine most of the time so it’s inconsistent at best for me.
No pattern to the failure either. I did try to correlate my logs to those posted but could not find consistent failures with the limited data set.
Thanks for continuing to try to solve this.
I'm getting the same error on FS1 and Investigation Discovery. On ID it happens after every commercial and sometimes FS1 won't even open. Any solution? This just started happening after I upgraded to version 2020.03.10.1810
2020/03/13 10:53:44.846598 [TVE] stream timestamps: fs1: start_at=2020-03-13T10:53:43-05:00 current_at=2020-03-13T10:54:10-05:00 end_at=2020-03-13T10:54:13-05:00
2020/03/13 10:53:44.846684 [TNR] Opened connection to TVE-Fubo for ch6197 FS1
2020/03/13 10:54:00.923729 [TNR] Sharing existing connection to TVE-Fubo for ch6197 FS1 (clients=2, len=0)
2020/03/13 10:54:11.400496 [ERR] Error during stream TVE-Fubo ch6197 FS1: Failed to download file: https://x-live-fox-stgec.uplynk.com/ausw/slices/4c7/4f59ea65df184a2580ad8fc80d3eaa32/4c7689b197764322a2ea0b14a1f501fd/A0000000D.ts?pbs=52caf236d96c4e848650659ec3ea6d2f&_jt=l&chid=ab9513294ec74cc8affeeb95acd413ce&oid=06b4a36349624051a9ba52ac3a91d268&si=0: 403 Forbidden
2020/03/13 10:54:11.407152 [TNR] Closed connection to TVE-Fubo for ch6197 FS1
2020/03/13 10:54:15.806159 [TVE] stream timestamps: fs1: start_at=2020-03-13T10:54:15-05:00 current_at=2020-03-13T10:54:42-05:00 end_at=2020-03-13T10:54:45-05:00
2020/03/13 10:54:15.806215 [TNR] Opened connection to TVE-Fubo for ch6197 FS1
2020/03/13 10:54:34.044258 [TNR] Sharing existing connection to TVE-Fubo for ch6197 FS1 (clients=2, len=0)
2020/03/13 10:54:38.965430 [ERR] Error during stream TVE-Fubo ch6197 FS1: Failed to download file: https://x-live-fox-stgec.uplynk.com/ausw/slices/4c7/4f59ea65df184a2580ad8fc80d3eaa32/4c7689b197764322a2ea0b14a1f501fd/A00000000.ts?pbs=52caf236d96c4e848650659ec3ea6d2f&_jt=l&chid=ab9513294ec74cc8affeeb95acd413ce&oid=06b4a36349624051a9ba52ac3a91d268&si=2: 403 Forbidden
2020/03/13 10:54:38.967156 [TNR] Closed connection to TVE-Fubo for ch6197 FS1
2020/03/13 10:55:47.554212 [TVE] stream timestamps: hallmark: start_at=2020-03-13T10:55:11-05:00 current_at=2020-03-13T10:55:59-05:00 end_at=2020-03-13T10:56:07-05:00
2020/03/13 10:55:47.554267 [TNR] Opened connection to TVE-Fubo for ch6090 HALLMARK
2020/03/13 10:56:00.118240 [TVE] stream timestamps: investigation-discovery: start_at=2020-03-13T10:55:59-05:00 current_at=2020-03-13T10:56:20-05:00 end_at=2020-03-13T10:56:28-05:00
2020/03/13 10:56:00.118293 [TNR] Opened connection to TVE-Fubo for ch6107 INVESTIGATION-DISCOVERY
2020/03/13 10:56:00.122927 [TNR] Closed connection to TVE-Fubo for ch6090 HALLMARK
2020/03/13 11:37:34.210808 [ERR] Error during stream TVE-Fubo ch6107 INVESTIGATION-DISCOVERY: Failed to download file: https://x-default-stgec.uplynk.com/ausw/slices/ca2/4f59ea65df184a2580ad8fc80d3eaa32/ca26ad93241b4295b174d788e68c8b77/A00000000.ts?pbs=f5107e4a876744a8ae12b3ec3cd05235&_jt=l&chid=a6fe2dd55b3149a6a59154a93e348012&oid=e6cf0c55dac249f0a0f72e7c72e6f6cb&si=14: 403 Forbidden
2020/03/13 11:37:34.216224 [TNR] Closed connection to TVE-Fubo for ch6107 INVESTIGATION-DISCOVERY
I am seeing this to now.
Here is device log with it frozen black screen....show was on, then went to first commercial break, did not even load commercial.
from the server 2020.03.14.1915
2020/03/16 14:46:18.316793 [ERR] Error during stream TVE-Comcast_SSO ch6101 DISCOVERY: Failed to download file: https://x-default-stgec.uplynk.com/ausw/slices/e4f/4f59ea65df184a2580ad8fc80d3eaa32/e4f1df2a25ff483fb1a0caf2a41e82ee/A00000000.ts?pbs=9e9686ebe5074839a3fa4d0d1989e2b1&_jt=l&chid=19334c6a5c614c46b2f198f15c179163&oid=e6cf0c55dac249f0a0f72e7c72e6f6cb&si=15: 403 Forbidden
Can some sort of error correction be put into the sever.
I would be when this stream error happens, then the sever retries/reloads the connection automaticly so that the client device does not have to stop playback then relaod channel manualy.
When Decoder is set to Hybrid, this results in the channel, freezing for a sec, then i closes out the stream and goes back to the top of the guide.
BTW, this happens with both stable and beta ATV app.
I get the same thing on Sony Android TV but i can't change my decoder. It always fails during the commercials.
2020/03/17 13:45:57.846507 [TNR] Opened connection to TVE-Fubo for ch6110 SCIENCE [transcode=none]
2020/03/17 14:13:18.874790 [ERR] Error during stream TVE-Fubo ch6110 SCIENCE: Failed to download file: https://x-default-stgec.uplynk.com/ausw/slices/fed/4f59ea65df184a2580ad8fc80d3eaa32/fed31c82e04c41789c2771b3f46f2785/A00000000.ts?pbs=e99ab6759f7b4133821ceb42d75416b6&_jt=l&chid=a757889d020549f98b0bc0671cd95751&oid=e6cf0c55dac249f0a0f72e7c72e6f6cb&si=19: 403 Forbidden
2020/03/17 14:13:19.027745 [TNR] Closed connection to TVE-Fubo for ch6110 SCIENCE
I see the same ads often and sometimes back to back. The black out normally happens during the commercial and happens randomly.
Channels DVR version: 2020.03.17.0125
Clients: iOS / Shield
Getting the same errors as above on FNC.
2020/03/17 12:51:51.431492 [TNR] Opened connection to TVE-YouTubeTV for ch6073 FNC
2020/03/17 12:53:34.802405 [ERR] Error during stream TVE-YouTubeTV ch6073 FNC: Failed to download file: https://x-live-fox-stgec.uplynk.com/ausw/slices/08c/4f59ea65df184a2580ad8fc80d3eaa32/08ce798d3c554cb0aab5e2d00bb16ae3/A00000000.ts?pbs=5e53cf9d4f244d33becb61f284528309&_jt=l&chid=1e298c9d65a245b3bd37f339cadcca58&oid=5b6fd7c6528d417e8bdad7f79754bb9e&si=1: 403 Forbidden
2020/03/17 12:53:34.811386 [TNR] Closed connection to TVE-YouTubeTV for ch6073 FNCYup, its always the same error..
Any headway on resolving this issue?
It is making watching many channels very difficult.
Being stuck at home with nothing to do now....want to watch tv.
I havnt tried recording a program on the affected channels yet though.
It's more than just specific channels. I also get an error where I'll be watching and then it pops up saying it's not available in my area. I click back and play again and now it's fine. 
Edit; now I went to commercial and it went black and the AppleTV app said connection lost. Now when I go back in is says tuner not available? That's odd.... It's TVE!
yea. i have gotten failed to tune or something error a few times now when i try to tune to a tve channel, like Comedy Central and Discovery....i then laod some other channel up for a sec, then go back to the channel that would not load and it works....until a comerical come on.