How to get this reflection correct?

I am trying to use the Box and Sphere Reflections to get the correct reflection on the shower screen in a Bathroom. While after applying the Box reflection (Covering the whole room) and sphere reflections (near each fixtures such as Shower and Tap mixer), I just found the reflection on the shower screen was twisted and that issue was mainly causing by the Box Reflection. Anyone had the same issue or know the solution?

Did you set the faces to flat in your 3D modeling software ?