Weapon damage not accumulating during arkfalls

[Alechiel]

I get plenty of weapon XP at arkfalls.

Well I can say arkfalls don't grant mobs exp at all, now I'm not sure about weapon XP.

[squidgod2000]

Was watching it last night while running some arkfalls. Got about 40k during a scrapper major, though I was only targeting the forges and other bullet sponges. Also maxed the weapon (LMG) during a later minor arkfall.

[Krymzon]

The 0 damage is probably because you have a cluster grenade equipped. I noticed this when I had one equipped and I took it off and the damage dealt went back to a number instead of 0.

They should probably fix that then...now I need o stay away from cluster nades as to not mess up my damage ratings and rankings at arkfalls and in co-op...