Ok, so I've been having this issue for quite some time but I have been ignoring it assuming it was my problem/fault.
Well I can't ignore it anymore, so far it has caused me dozens of misses/or missed opportunities.
So when I am in sniper mode and am aiming at a target, if I am near a building or dead tank and i get too close to either the aim reticle jumps off target and "sticks" on the building or tank. I have to aim far away from the building or dead tank to get the reticle to get "un-stuck" from the object and get back on the tank.
I run my setup with auto-aim off.
this glitch is annoying and I would hope WG can fix this.