As above old sensors can cause this and also low batteries in local wireless devices. Another cause of jamming is newly installed LED street lights.
turn wireless jamming to 000 and have done with it.
I second the method of deleting the first expander and relearning all onto the 32 way. We have had a couple of sites where the supervision issues are constant on two 8xp, swapped them for a 32 and no more problems fully meshed
The screw shouldn’t be an issue, unless you’re getting a tamper fault. Did you do a bell test following replacing the battery?
I’d be inclined to delete the bell from the system and re-learn
If your installer can’t see any requests for phone authorisation then I’d suggest double checking your System ID is correct in the app. Be careful of the 0/Os and 1/Is
Static IP address will allow for sped up playback on ProControl. Other than it it’s setting up a DDNS to log into the NVR which would also allow the sped up playback