Is this a common problem? What can I check?

It does not matter if the bolt is open or closed, the thumb safety is stuck in the fire position and will not slide back to the safe position. Gun is almost brand new that I recently bought from an individual. I would say altogether, maybe 50 rounds have been fired from this gun. He says he never had any problems with it.

Surely I am not doing something wrong. I also have a Savage 111 and have absolutely no problems with it.