it’s not the alt key that does not work. it’s the combination of a PRESSED alt key and the space bar… my caracter can’t crouch jump when crouch is on alt… it works perfectly fine when crouch is on ctrl… i’m running 4.12.3… still there.
It’s my own crouch not the built in version… but as I showed, the issue is not the crouch function itself cuz it does not work on a blank blueprint in a blank project.