Since upgrading from 4.10 to 4.12, all my keyboard keys associated with special key AltGr for hotkeys, stop working.
If I set, for example, ad hotkey for a+AltGr, the key "a" stop working in all desktop applications. If i hit "a", it writes nothing

I launch xev and then try to hit the keys (which are associate with AltGr), this is the output (for m key):


FocusOut event, serial 37, synthetic NO, window 0x2800001,
    mode NotifyGrab, detail NotifyAncestor
FocusIn event, serial 37, synthetic NO, window 0x2800001,
    mode NotifyUngrab, detail NotifyAncestor
KeymapNotify event, serial 37, synthetic NO, window 0x0,
    keys:  87  0   0   0   0   0   0   0   0   0   0   0   0   0   0   0
           0   0   0   0   0   0   0   0   0   0   0   0   0   0   0   0