de Vandemar Croup - 2023-06-04

Hello,
just switched to using macbook recently, quite new to apple family, trying out FUSE to stay in touch with speccy - and for the few things that I tried for starters it's everything working fine, just when switching to fullscreen (cmd+F) Fuse doesn't respond to any keypress on my macbook, just getting the "warning" sound as a no-go.
switching back to framed view it works OK.
what could be the problem here? (Fuse version 1.5.6.)
thank you