AltGr+F toggles Ctrl+F in Python editor


I have a rather annoying issue: on my keyboard layout (Hungarian) AltGr+F toggles the left bracket [, in the Rhino Python editor it also toggles the find and replace window at the same time (normally Ctrl+F): every time I need to click on it to close it. Rhino 6 and 7, Grasshopper GHPython nodes are also affected.

Rhino is the only program I have this issue with, I can happily type the left bracket anywhere else.

Any suggestions to solve this? I have an older Apple Keyboard with the numpad (wired) if that matters.

I’ve changed keyboards (using a wireless Logitech K330 now), the problem persists - can we rule out hardware issues?