Not sure but you must turn (clockwise)the shutter plunger itself (should be a dot on it) back to line up with the dot on the top plate. It has a tendency to twist counterclockwise when releasing the shutter collar to rewind.
All three dots have to line up at 6 o`clock to be in the film advance mode.
I'll look at that. It seems the little mechanism at the bottom of the camera that engages the sprocket drive won't return to the up position. This might be the cause.
That would be nice. I like the Jupiter 50mm lens that are on them