ah ok, thanks a lot for that. I’ll look into it. I’d gone through minimising texture sizes, minimising the shaders and materials used, all to no avail… so thanks for the help.
If you want to get to the bottom of it, the most likely cause is some resource/class/object that you load or instance, maybe something you do every time you switch between scenes. If it's in your own code, you're looking for a logical error like a list you never clear.
