As the screenshot, you can see my fire directly at the mine (the crosshair is off-target from recoil, i had to spam LMB and f12).
The proxy dropped another mine on the corner of where I was standing and I couldn’t blow it up either, had to defuse it ‘manually’ with a QW-style trip-n-dodge.
After firing a whole mag of KEK i finally managed to shoot the mine down.