This problem recently posed itself to me in the form of a friend’s .38 snub-nosed revolver.
After a day at the range, the cylinder ejector became extremely stiff and was almost impossible to turn; it rendered the shooting of the weapon moot.
Nothing major had happened to the .38 and it was not excessively fired.
Given revolvers are so dependable, it stumped more than a few of us trying to figure out what was going on.
A Google search gave me a good idea, though.
Turns out, stuck ejectors are rare in most revolvers but not unheard of.
The video on the next page shows how to address this issue if it happens to you and it is so simple, you should try it first before taking your firearm in for maintenance.