We had constant issues with our shower doors, they apparently were put in 'backwards'...
the one that should have been closest to shower was on the outside, etc...
so every time we moved they bounced out of the tracks...
Won't help your immediate issue, but we got to where we just immobilized them with 'stuff' - boxes, bags of shoes, etc... it actually turned into a good storage place for a lot of stuff until we got to a site