Are you leaving while it is overheated and does not fire? Small but very important detail because the turrets on other maps(Abyss in Horde, The Onslaught in Escape) also used to/still bug out and stop firing for a specific player when they get off while it’s overheated(the latter is only the case if the issue was never fixed which I don’t recall). So same problem may be affecting the Mech turret.