First, I still had that problem that when -after surfacing- the OSTC kept showing 0.1m. Unfortunately, after upgrading, the debug mode was off, so I don't have the debug code. I'll see if it still happens in the future.
Secondly, is there a way to change the deco model during a dive. A few days ago, I was at 33m when I found it odd that the OSTC was counting in seconds. Of course, it wasn't until then that I realised it was in apnea mode. It was however impossible to set it back to normal 'dive' mode. Could you add an option to change this? Although I think I have a world record apnea dive of 35 min.
btw, the OSTC counting in seconds is cool to see...
Was the unit still reacting to a button press or was the Display freezed? An offset of 0.1m after a dive may be possible. The sensor moves slightly in it's seal (pcb is bending under pressure). There may be some stress on the substrate that results in this (temporally) offset. We see this after the 10Bar pressure test sometimes.
During the dive, the deco-mode can not be changed. You should power on the unit manually before the descent to check the mode.