Recording Interrupted "Could not fetch playlist net/http: timeout awaiting response headers" - is it hlstube?

Running Channels DVR v2023.05.12.1543 in a container on the same NAS as the hlstube v0.0.7 container

No errors in the hlstube docker log

extract from debug recording log

action=fetchMediaPlaylist err="Could not fetch playlist net/http: timeout awaiting response headers" time=14.000961734s
action=refetch lock_time=14.001138616s failed=true err="Could not fetch playlist net/http: timeout awaiting response headers" live=true time=14.001157993s
action=fetchMediaPlaylist status_code=500 status="500 Internal Server Error" content_length=79 time=4.026341ms
action=refetch lock_time=4.128721ms failed=true err="Could not fetch playlist 500 Internal Server Error" live=true time=4.154214ms

On the third retry, Channels DVR was able to resume using the same master playlist.
The same live YT stream worked fine using the Kister Method on my other NAS.

Error occurred at 19:59, zipped debug recording log (11.6MB) is available if needed.
Logs have been submitted as 37994635-5f4c-41c8-b8fb-57672408d82e

Wanted to update this.

I found that my router renewed its WAN DHCP IP address at the same time the interruption happened. According to Synology, my router brings the WAN network interface down and back up when it renews the dhcp lease. Even if it renews using the same IP address (which it does).

I can't explain why the same YT stream (at the same time) worked using the Kister Method.

I changed my router settings and will keep an eye on it.
I'm testing by using both hlstube and the Kister Method on each recording for now.