(0.632) Equip next shield forces window mode

[nian]

When pressing equip next shield button (remapped to F2) forces game into window mode.
Select device sign appears. Press OK to get back to fullscreen mode - not possible and the following error message appears "Unable to to set render target texture! Try turning off shadows"
Pressing OK button exits and get's you back to desktop.

 

[Ilex]

Don't bind any commands to f2. Should work.