Shorcut for "Umdeuten anhand des Notennamens darüber"

I’ve got the following problem (German keyboard, German language, Win 10):
The assigned shortcut for “Umdeuten anhand des Notennamens darüber” (respell enharmonic with the upper note or something like that) doesn’t work for me (alt + '). The shortcut to resepll into the other direction works fine (alt + ß). I tried to change the shortcut, but it doesn’t work if I assign a shortcut which uses alt + shift + something (tried alt + ?). If I change the shortcut to “w” e.g., it works. A bit strange …
Any ideas?

Yes, Daniel has replied to a similar question of mine a while ago: https://www.steinberg.net/forums/viewtopic.php?f=246&t=105259

Seems like the fix hasn’t made it into production yet…