Yes, I have the same issue.

I posted a similar question on 21 December, the single respondent initially assumed I was referring to the piano roll, but when corrected, provided a screenshot showing accidentals on his system.

From that, I assumed that the issue was in my system and left it at that.
Now I wonder is it more widespread but not being picked up because the RealBand users seem to be much less than BIAB and most seem to use the piano roll for editing.

I will report this to PGM Support and hope they respond,(I still await a response to another issue, posted early December 2021)

Vintage