I have a similar issue. I have 3 TV’s connected to ST. HA connected to ST as well. 2 of my TV’s always online and older TV goes offline in exactly 60 minutes after powering it off (through any source: HA, ST or physical remote).
Have no idea how to get it back online remotely.
I have 2 options here:
- turn it on with physical remote
- install controllable power switch and trigger power. TV gets back online if I disconnect power cord and connect it back.
On that TV I have latest FW and it works perfectly fine when online.