KOY keyboard layout is broken on kde wayland

Hi, I notify that the koy keyboard layout is broken on kde wayland.
The 4 and 6 layers, with does use the modifier M4 dose simple not work.
koy layer4
koy layer6
source: Alternative Keyboard-Layouts

All other layers, including the layer, witch does use M3, does work as expected. This is sadly pretty annoying, because so the number pad ist not use able.

This issue does not appear at the tty or at Cinnamon.
The x11 version of kde seem to be also effected, but if I call setxkbmap de koy every layer does work again.
Sadly I can not perform this fix on wayland.

Moving Dvorak below koy has fix the issue.