Internal doors don't sit in frames, the technical term is a door liner. The door liners are fixed to the wall they sit in by mechanical means (shimmed at fixing points to keep the liner straight and plumb). Traditionally this is done using masonary or cut nails, but now days using screws and plugs. These fixings are hidden either behind the doorstops on the frame (in the case of good chippies) or with filler.
I'd be surprised if they moved having been left without support.
Internal doors don't sit in frames, the technical term is a door liner. The door liners are fixed to the wall they sit in by mechanical means (shimmed at fixing points to keep the liner straight and plumb). Traditionally this is done using masonary or cut nails, but now days using screws and plugs. These fixings are hidden either behind the doorstops on the frame (in the case of good chippies) or with filler.
I'd be surprised if they moved having been left without support.