Hi MonstrumHD,
When using reflections will want to use smaller radius’ and/or box reflecftions for box like rooms. The Reflection Capture does not get occluded from geometry, such as walls. So if you have a large radius on your reflection sphere it will surely be visible outside of the area you would like.
These two pieces of documentation can help you get setup and using reflection captures more accurately.
- Reflections Captures in Unreal Engine | Unreal Engine 5.1 Documentation
- Engine Feature Examples for Unreal Engine | Unreal Engine 5.1 Documentation
I hope this helps.
Tim