I haven't tested this with other UAVs or choppers or things that use such a mechanism, or against other tanks or vehicles in general, but I have even tried it against the ground and it still happens, so I assume that it should happen in every case (under these circumstances). The problem seems to disappear if you can manage a laser lock-on, though, so it's not completely broken. My original post was pretty haphazard, and I don't think I have the tools to be able to determine exactly what and why, but I'm just reporting this weird behavior and wonder if it is intentional (I would doubt) or not.