A major bug in mouse operation.

Aiming down sights (ADS) while stationary is not a problem. However, when I encounter an enemy while running or moving and try to aim down sights (ADS), the mouse sensitivity doubles. In other words, if an enemy is at a 90-degree angle, trying to aim at them causes the viewpoint to rotate 180 degrees, making it impossible to ADS. This is because the sensitivity after ADS is normal, but the sensitivity during the transition to ADS is abnormally accelerated. If I move the mouse even slightly while ADS, the viewpoint moves at an abnormal speed, making it impossible to engage in a proper firefight. I have turned off mouse acceleration in the settings, but that doesn't seem to be the cause. This has been happening since a recent update.