Problem with drum maps in PRV

[Skyline_UK]

I have a drum track from a MIDI file that I wish to use in Addictive Drums.  The MIDI file is in GM but I want to use AD2 as it his a wider choice of notes/kit components.

My usual way of doing this is to open the drum track in PRV, right click on the keyboard and choose GM under 'Use these note names instead'.  I then take a screen shot so I know the names of the kit components being triggered in GM.  I then repeat this, choosing instead 'AD2 Standard' note names and these duly replace those on the keyboard area at the left.  I then, using the print out of the screen shot, drag the MIDI hits to where I want them on the AD2 map.

I've always done this successfully, but now there is a glitch.  When I select the row, say, for closed hi hat and go to drag that row from the wrong row up to the correct AD2 one, clicking on it to commence the drag causes the map on the keyboard to switch back to the GM drum names!!  How can that possibly happen?  Is it a new bug from a recent update?

Edited March 27, 2022 by Skyline_UK
Info added.

[sjoens]

If you're on the actual Keyboard view (with note names) & not the Drum map view, which is above it (normally hidden)... I can't reproduce this.

Try it in another project.