How to stop/disconnect incoming NDI-Streams?

Hi there, I am trying to DEACTIVATE a incoming NDI stream receiver (UE 4.26).
theres a node for start and also for stop broadcasting, but nothing to stop an established “find network source by name” >“start Receiver” …
Any Suggestions?

Backround: Changing Levels with incoming NDI streams running, causes crashes. Without that it runs smooth, so I want to deactivate NDI input before changing levels

(i’m pretty sure i didn’t find the right forum/Tag here, and i apologise for that but maybe someone knows something anyway. thanks :slight_smile: )