RAP-App Object Page using Visual Studio code:layout issue titles twice after deployment launchpad

[#1]

Hello Experts,

I am developing a RAP-App with a List Report and Object Page using Visual Studio code.
After deploying the app I have the issue that the layout of the deployed Version is different from the preview that was shown in VS Code.

Unfortunately the titles are shown twice and with a huge gap in between.
Does anyone know how that happens and what I need to do to make sure the deployed Version Matches the preview and does not show the title twice ?

Screenshot Preview:

 

Screenshot deployed:

Thanks for your help