I disassembled my bersa .22 magazine to clean and lubricate. I thought it might help a problem feeding rounds. I had no problem with assembly or disassembly, but now I have a problem with the magazine function. When I cycle the slide with an empty magazine inserted, the slide stop catches and will not release. If I release the magazine, the slide stop will release normally. I removed the slide and inserted the magazine. I noted that with the magazine fully inserted, the follower can not be pushed down and the slide stop release will not move. If I release the magazine slightly from the fully inserted position the magazine follower moves up and down normally. Any ideas what I can do about this?