Last known good version:
Read-write .ini or .ue3profile
For demonstration purposes, 30 fps
Can be reproduced offline (SwitchLevel):
When fully aiming down sights, all weapons instantly shift right and return to the center on the first shot. It resembles a missed frame.
If shooting repeatedly, only the first shot will show this behavior. Once you stop shooting, it will occur whenever you start firing again. You may still need to wait a few moments even when the firing animation "looks" like it's finished.
This affects any weapon with ironsights, including the Revive Gun (minimum charge counts as a shot), Artillery Spotter, and possibly sniper rifles (when firing repeatedly, the first shot is centered, and subsequent shots are offset).
Steps to reproduce: