Playback Freezing OTA Fire Stick

I host Philo, Locast, and an HDHomerun for a single channel via antenna, and it is this channel that is giving me issues. Philo and Locast channels play fine, but the antenna channels seem to have issues. While on the one antenna channel I need, it can occasionally just freeze, yet you can scrub through it and the content is there, just not play it. The channel does record, but also occasionally will not play, even though you can scrub through it and the content is there. A restart of the app fixes this most of the time, but it's annoying to have to do this constantly to watch one channel. Other times it will come up with a black screen and the circle will spin, but it won't play until you reset.

Any idea what the issue is? I assume it's some kind of decoding error, but I don't know if it's the fire stick, Channels, or the server. Not much of a tech person so I could use a few tips. It plays fine through the HDHomerun itself so it's an issue with how Channels is receiving it. I've attached a couple images, not much to see other than that the first appears paused though it is frozen, and the second is a recording that will not load.

Which model Fire stick? You could try Settings > Playback > Advanced > Video Decoder: Software

4k Fire Stick, I tried changing it to software before but from the server instead of the actual app- I see it now. Hopefully that helps then, I'll let you know if the issue persists.

Another thing to try.... On the Firestick ChannelsDVR client, do Settings->Playback->Streaming Quality->Home Streaming and then choose something other than "Original". This will, I think, force the data stream to get routed through the DVR server and transcoded en route to the fire stick. The transcoding process might clean up whatever is causing problems. I did this to eke a little longer life out of an old (non-4k) Firestick stat had trouble keeping up with the full-bandwidth data stream.

sometimes it happens also to me when I see OTA channels from HDHomerun.
When hannens I have to to to "On Air" page and reselect the channel to view (play/ pause forword and rewind do not work)
If I try to use software decode I can't see HD channels (they pixelling)
I Have raspberry PI 4 with only Channel dvr (with network cable) and Firestick Tv 2021 version
Thank you

Any good news?

thank you

Sounds to me like you have a marginal signal and the decoders can't handle to errors/dropouts. Is it the same for every channel? Or are some channels better/worse?

Also, while watching a live channel in the Channels app, if you can figure out the IP address of your HDHR tuner, enter that in the address box of a web browser, then click on the "Tuner Status" link, then click on the tuner that the Summary says is in use and look at the Signal Strength, Signal Quality, and Symbol Quality values. The symbol quality should be 100% for a good experience.

Thank you for your reply.
It happens the same for every channel and it does not happen if I use HDhomerun app.
The signal strength, quality and symbol are about 100%.
It happens on two firestick after a few tens of minutes.
For each firestick the bandwith is better then 200 Mbps

I think it ould be usefull a system that retry to restart the streaming also it happen lost of signal