2nd TCL in 2 weeks having same issues after return/swap

I’m on my second QM7k and it has a long delayed turn on (like 10mins sometimes) It powers on but the picture doesn’t show up until later. Also it freezes when watching regular TV if i adjust the volume, change channel, etc. I thought this was an ARC/eARC issue so I switched to optical cable but no change. This is ridiculous, everything’s updated I’ve tried changing power settings and everything. What is the deal??