My 41 is the same vintage as yours; a 94xxx. It has been quite temperamental at times. I tried all sorts of "fixes" but the most effective was a thorough cleaning. Cleaning the chamber and slide didn't do a lot, but cleaning the frame's guts helped immensely. I drenched the frame area with Kroil, brushed it with a soft toothbrush and repeated several times. It doesn't like to be dirty, but doesn't like to be spotless either. Just after a cleaning, it's cranky until I get a few rounds down the tube and it gets it's sea legs. Doesn't like thick lube or grease either; especially in cold weather. Once I figured out its quirks, I began to really enjoy it.
A couple more thoughts: Make sure your thumb isn't, even lightly, touching the slide stop. I found myself doing this and it caused all sorts of troubles. Also, your grips aren't the same vintage as the gun's serial number implies. Make sure they are properly reliieved and aren't interfering with anything underneath of them.