Change all calls to blocking.
Took me six hours of debugging to find out that was the reason for khotkeys to magically deactivate it's global shortcuts on reread_configuration().

reread_configuration() deletes all global shortcut actions and then recreates them.

The setInactive call was nonblocking and therefore executed delayed.
Don't know why but i guess that's an implementation detail of QDbus*.

So much delayed it was executed after deleting and recreating the actions.
It made the newly created actions inactive :-( .

Very frustrating debug session.