oh i did not know that the strobe retracts automatically when you switch of the camera, on other cameras usually you have to push it in.
You may stick the film inside the housing in front where the strobe is, this may dampen the light to avoid the reflection.
Did you asked PATIMA, they are very helpful on any problems with their great housings?
Do you know what, I hadn't thought of that. I'll email them today......
Thanks for your help.