Latest version of Tvheadend does not work on LE 9.2.5 on RPi 4

I have a new installation of LE 9.2.5 on an RPi 4 with a setup that I restored from a backup of an x86 machine running 9.2.4. This is also my first experience w/ a Raspberry Pi.

On this RPi 4 system, the latest versions of both Tvheadend HTSP client and the Tvheadend server do not appear to be working.

The Tvheadend htsp client v4.4.21.1 fails to load with "unknown error". Version 4.4.20.1 does not have this problem.

The Tvheadend service addon v9.2.0.123 apparently fails to start. On system startup, I get a "Communication error - can't connect with Tvheadend" from the client. The Tvheadend web interface is not reachable, and when I try to watch TV the PVR manager basically hangs at 0% of startup.

The Tvheadend service addon v9.2.0.121 and v9.2.0.122 start, but I do get an error that "the server fails to respond properly" on system startup. However eventually I do get a msg that a connection has been established and watching TV works.

I don't know if this is relevant, but my tuner is an HDHomerun, as I recall, model HDHR5-2US

Thank you for the response and advice. I have already removed and re-installed the addons. Sorry I did not make that clear.

The downside for me of downgrading the versions is that the PVR manager takes a really long time to start. But like you I don't restart the pi too often.