fluxx

This might be thermistor losing contact with the block or wires losing contact. It can also be the heater wires losing contact somewhere. To diagnose, you can try and wiggle the wires when you preheat the hotend and watch the temps. Then you will know what needs replacing. I once had a thermistor that was faulty, I replaced it, the problem went away.

Are you me? Cause I have exactly the same setup. Navidrome, tailscale, the whole thing. I also use strawberry. It’s OK but a bit basic. I recently tried Nocturne for desktop, looks promising, but still somewhat buggy.