Reload Scene Mesh after Application Start

Hello everyone, 

my problem is that the room mesh doesn't update. I want the room mesh to be updated, everytime my application is started again. However, it seems like the mesh loaded from the first time is always reused and doesn't update, even when I update the application. 

How I update: I build an AR app (.apk file) on my laptop with Unity and deploy it to my Meta Quest 3 headset, which overrites the previous .apk file. 

What I see: a flickering mesh all over the place of the "original room", even when I go to a neighbouring room, it shows the mesh of the first room (it's like looking through a wall). 

I followed the set up instructions and my "Hello World" and first tries worked properly.

For my current version I am Using the following building blocks: 

• Camera Rig
• Passthrough
• Scene Mesh
• MR Utility Kit
• Scene Debugger

As you can guess I am quite new to Meta Horizon Development. I've been stuck on this problem for quite a while now. Any tips/advice/recources to resolve this are highly appreciated.