Great find! I can reproduce it too.
Step 1 to 7 is how it supposed to work, I think.
Step 8 and higher is where the bug(s) occur IMO:
Step 8: scrolling should still preview total sample, despite there was a sample assigned by pressing A1
Step 11: This is a new pad with a new assignment. I think it should work exactly like step 1-7, so without any state about pad assignments before.
I’m also having a problem with the pad itself not triggering the sample while still in track settings. I’m pretty sure that is new in the latest firmware, but I have not tested the 2022 firmware yet to confirm my suspicion.