Strange. Tested in Oricutron and real hardware more than I liked the game for . Never saw the issue. Also not with trying the now public DSK on Oric.org.
Must be a bug then somewhere that I can not reproduce in my environments. Really not once encountered this here. If anyone encountering this in Oricutron can send me a snapshot of the game state including description of the environment used to run it, it would be appreciated.