Keybinding also works.
Generally speaking, changing properties of an actor via the properties panel during gameplay is going to result in odd behavior like this. I’m fairly confident that when you change a property during gameplay the editor will “refresh” the actor as you’ve now just change a property which could effect its construction.
Yes it realy looked like it was creating a new instances or alt least refreshing the instance and pointer.
Thank you very much. Now I know ho to handle this and can go on 
Thanks a lot. Have a nice evening/day bro.