Do you know anything about the structure near the bathrooms?
All wood structure? Joist size? Joist span?
It sounds like a progressive problem. When did it start rubbing again? Temp and moisture increases cause swelling
Do you have pictures of closed doors (that rub) that you can share?
I'm looking at the pictures now.
These look like cracks associated with vertical deflection of the supporting members. These are difficult to diagnose when you have access to the house. I will think on this and get back to you ASAP. It could be settlement or deflection or possibly something else
When a beam sags, that is vertical deflection. The difference in wood is that it creeps, so deflection increases over time, even if the load never increases
I agree. They don't mind jumping to conclusions because you're paying for it all. Let me put some effort into this and get back to you ASAP