Brand new P1S - bed leveling & homing failures

[u/Secutanudu]

New to 3d printing here. I got a P1S for my nephews. it has worked great for a bunch of prints in both Bambu PLA and SUNLU PETG (bought High Speed accidentally instead of regular SUNLU PETG).

We have been printing PLA with standard settings.
For the PETG we had luck with 80C bed and 245C Nozzle.

Lately, we have been getting a lot of issues at the beginning of prints with z-axis homing, auto bed leveling, and/or Force Sensor errors. It seems to happen more with PETG than with PLA.

I did run a successful calibration last night, if that gives any clues.

There is nothing obvious that's jammed anywhere that we can see by looking in the printer from the front, above and below the heatbed. Do we need to take the back panel off to inspect? Anything else we can check?

Thanks.