I am having this bug. I have had it occur on 5+ official servers and like 10 different community servers. What is bizarre is that it is not occuring on ONE server, DayOne Livonia Autumn. My camera moves completely normal there yet is bugged on their Chernarus server.

The second part of the clip I posted is where it is working normally. Out of the multiple official and community servers I tried, my camera only worked normally on DayOne Autumn Livonia.