Permenant PSG-1 problems?

I was playing a TD Monaco, to use my PSG-1, but i found out that it only shoots one bullet when you're zoomed in, i clicked to fire more times, but it just wouldn't fire that second bullet. It will fire more than once when it is zoomed out however. This bug is really annoying, since my only sniper is the PSG-1. I hope it can be fixed soon.