No matter how I try, the perfect fifth kill doesn't count. tried several older and newer guides on youtube. Even if opponents of all kinds only die from the burning damage after the explosion, it doesn't count.... now have a good 2064 kills on the weapon and the counter still shows 1 of 50. Is this bugged and can't it be done at the moment? Would be very grateful for helpful tips.
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if it's known, then I wonder why it hasn't been fixed.