Mapping the Super-Key, used to work, but now it fails to save in the user preferences.

For Example, Mapping Supet+A works, but on restart it fails.

Pasting the output of the shortcut into python2 prints it as:
'\xe1\x9f\x80, A'
... on reload it simply sets it to
', A'

output of xev:
--------------

KeyPress event, serial 46, synthetic NO, window 0x2400001,
root 0x287, subw 0x0, time 5141337, (18,104), root:(4202,644),
state 0x10, keycode 133 (keysym 0xffeb, Super_L), same_screen YES,
XLookupString gives 0 bytes:
XmbLookupString gives 0 bytes:
XFilterEvent returns: False

Im not sure if this is QtCreator or Qt, but the problem is really not so nice since I normally map a lot of functionality to Super key