after few switches from us to ru keyboard layout it does not switch any more until I press some buttons in "keyboard" setup window, like "default" and set input lang's again.

Reproducible: Always

Steps to Reproduce:
1. Setup 2 keyboard input lang's en + ru default profile via kde "keyboard" applet
2. Try to switch in between input languages layouts.
3. See how it stops switching between layouts after few switches I believe 3-5 switches is enough to see it. I use open mandriva beta 2 freshly released. Can be fixed for another 3-5 switches if you run kde "keyboard" then press any button or reset everything to "defaults" and then set up same configuration again so you proceed to step 1 again ;D

Actual Results:  
System tray input methods switcher freezes upon 1 random language en or ru and can't change input language any more.

Expected Results:  
I expect it works fine and switch language layouts! Damn it! :D fix asap!

plasma 5.6.5
frameworks 5.23.0
qt 5.6.1
kernel 4.6.2--desktop-3omv
system x86-64