Is this amount of errors normal, multiple reboots/repairs before it finally worked for a few mins, why?

I can’t help you with this, as I went in another direction by flashing my Tuya devices with Tasmota firmware. You’ll be better off posting in that ongoing thread than continuing this one (which has now strayed far from its original topic).

Flashing Tasmota sounds hard, but it turned out to be pretty simple once I did it. This tutorial is about smart plugs, but it applies to any device in the Tasmota Template list. It states that you need a spare RPi, but you don’t. You just need a separate SD card with a fresh Raspbian installation.

Once you’ve done this, your Tuya-based devices will be discoverable by MQTT and you can control them easily with openHAB. Also, there’s no cloud requirement, so they’ll work without Internet access and won’t tell Chinese spies when you’re turning your lights on and off (if you care about that sort of thing).

If this sounds like a lot, then I would start with your TV (though I don’t know what the state of the Panasonic binding is). Just to have the satisfaction of something working the way it’s supposed to work.

As noted at the start of this post, I feel like we probably need to tie up this thread now that you’re on your way. Good luck!