Quite possibly. Framing screws can just be driven in with a hammer once the hole is drilled. They are usually a rawlplug type sleeve with a ribbed nail that has a philips head on. So sloppy installation can lead to them having some movement. You can fit extra ones retrospectively.
Thank you! This makes sense, I was wondering how it would initially be fixed into the opening - would there be screws from the frame into the brick?