Mini+ Y Axis Grind ONLY after Probe and Completed Print  

Mini+ Y Axis Grind ONLY after Probe and Completed Print

Brand new Prusa Mini+ assembled yesterday.  Several successful prints completed in PLA, PETG, and ASA.  I have made few configuration changes:

• Set and saved z-offset for both Smooth and Textured sheets
• Added a wifi module, upgraded to 4.0.0xRC1, and I am successfully uploading prints via PrusaSlicer connected directly to the printer
• I'm using the stock PrusaSlicer "0.2mm QUALITY" Print settings.  I've made no changes to Filament or Printer Settings.

Problem:  After the probe is finished generating the mesh AND when a print is complete, the print bed presents forward and grinds, perhaps 15-20 'rotations', quickly.  After the probe/grind, the job completes fine with remarkably good print quality.

This does not happen if I home all, it does not happen at the start of the print, Self Test reports success (more than once).  Only under the circumstances described above.   I would expect to see artifacts on print jobs if this was a general Y-axis belt tension/alignment problem.  Neither the print or my visual/audible inspection indicates skipping otherwise.  It seems more likely that this is a configuration issue rather than a hardware one, but I'm prepared to be wrong.

Thanks in advance for considering my problem!