Encoder issues? (push-fast-turn not working, some values appearing 'stuck')

In recent days I’ve noticed some strange behavior on my Monomachine (MK2+). Trying to use the ‘push for fast value change’ feature on the first encoder doesn’t seem to always work. But around when this happens, some of the display/encoder values seem to get stuck: they get the ‘inverse’ symbol in the display despite not being in step editing mode. Stranger still is that different values seem stuck on different pages (ie, encoders 1 and 2 will be stuck on ‘synth’ page, while it will be encoder 3 on ‘Envelope’ page).

I have been playing with some fast-ish patterns (160bpm) with a lot of parameter locks being recorded real time.

Machine bought new last year (on day of price drop, but one that had been sitting in available inventory), running OS 1.32B.

Anyone else run into this?