Me and 2 friends also have the same problem when using BA + Advanced Aiming System, the problem normally occurs when you "select" the tank(aim at him, getting the info of the tank with AAS) and then use the BA aim.
From the video I could see that you were using AAS, turning the AAS off will stop this problem from happening.
Another workaround is if you use BA aim before you aim at any tank.
Anyway just turn AAS off and you will be fine.
Be well & have fun!
Thanks for the work Aslain!