Heads up that if you get to 99 stacks on the first boss mote, it seems to disable your slotted runes, sigils, and infusions. Removing all the gear and then re-equipping it worked for myself, some people in my squad ended up just leaving the instance and coming back into fix it.
Noticed it when my sigil of concentration seemed to not ever be proccing. After checking hero panel, AR, and all bonuses from runes and sigils disappeared as well.
edit: http://imgur.com/k3pUP2c normal stats on right, stats on left with slots not working
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