Hey @JochenVsp,
Thanks for the report!
This looks a lot like rubber banding. It's especially noticeable when you're trying to open a door. It will open very briefly, then reset back to closed.
Can we try out some troubleshooting to see if we can help stop this from happening again? When you've got the chance I'd recommend starting out with the basic and advanced connectivity steps from the EA Help website.
If you're still seeing any weird issues like this after that please let me know. Thanks!