Ive been finding that after throwing the seeker mine (explosive not airburst) and it begins to track it's target that if kill the target it's going for it'll return back to me and then I need to manually target. However this is where this issue arises because when I ping a new target it just won't detonate. It chases them and then will return back to me leaving them still alive.
Also noticed similar if you threw at a target and killed it before detonating it returned to you rather than seeking next closest target, also found if you dropped it whilest moving between cover to avoid enemy fire it just moved with you rather than seeking closest target, is that normal behavior?
I seem to recall in TD1 that it 'seeked' the closest target?