Hi all...
Just wanted to add to this thread... I was having the exact issue as described in the thread title, and after reading, hoped the "repeating key" fix might work. Unfortunately, the latest version on the site (7.3.5) doesn't seem to resolve it. Is this still a work in progress?
In addition, I noticed that I don't even seem to be getting an initial shift, not just no repeating.
To clarify, I have set two buttons on an xbox controller (I know, not ideal, but it's my "portable" joystick setup 😉) to control throttle up (small) and throttle down (small). If the FSUIPC menu is focused, all controls work as expected, but there's the menu box on screen. If I minimize it and refocus MSFS, all FSUIPC assigned buttons no longer work (but MSFS configured buttons do).
I'll gladly clarify if you need specific tests.
Thanks in advance!