Fairly often when i deploy my seeker mines nothing happens, i can hear the sound of it following me, it doesnt show on screen, it doesnt go after targets and i cant dismiss it, so i have to wait for it to run out and then again wait for the cooldown to pass.....IT SUCKS...... had problems with it before but this is ridiculous.
I second this bug. It happens often, and is very frustrating. You cannot cancel the seeker mine, can't use it, can't throw it, and your player acts as if it isn't even available to throw. So it sits in your cue, looks available, but nothing happens. I can hear it sometimes following me as well, but nowhere to be seen. Wouldn't be terrible if you could actually cancel the thing and throw it again.
The only fix I've found is to try to switch OFF of seeker mine to another skill, like Turret, then switch back. You have to try many times for this to work and even then, makes the skill almost unusable.