Weird problem, the shutter curtain goes up after advancing the lever.
When I advance the lever the shutter curtain goes up by it self without releasing the shutter, the weird thing is that the shutter still fires and the curtain comes down after that certain time. This does not happen every time but after a few advances it goes up and stays there until I release the shutter. I checked the magnets all seem to work fine and also the battery level is normal.
@danj It works exactly as you said, the problem is when I pull the lever the first curtain goes aside and when the second curtain arrives to its place, it goes up and stays there until the shutter is released. Like this photo:
I was wrong about how the shutter works so here is a video of the problem: https://drive.google.com/file/d/1fYiGHHo...