Same issue as all of you guys.
Sniper disconnection 1 - YouTube
Sniper disconnection 2 - YouTube
Here are two videos I have taken and submitted to the main support thread, I find Siberia to be completely unplayable at the moment, the other two maps have the same bug but can be completed for me. (I know this isn’t the case for everyone though) This is locking me out of getting the sniper rifle and two achievements which is why it’s so frustrating.
Original post on the Bug report thread: HITMAN 3 - Bug Report Thread - #1057 by Georhan