Simple Move to not works if "Rebuild on Runtime" Navmesh is activated

Hello,

I have a character which you can control with a Top-Down camera and if you click somewhere, it does a SimpleMoveTo. That works perfectly until I anable the Navmesh rebuild at runtime wichich is crucial for my Project. If thats enabled, the Character only moves a few Units and then stops until I click again. My BehaviourTree controlled AI’s work just fine.

I hope someone can help me, thanks

Tobi