Sometimes summons (So far tested with weasel and puppet brigade puppets, but others report that their summons don't work either) will do the attack animation to raid points but deal no damage or gain experience towards leveling the jutsu. Level 7 or higher summons AND the puppet brigade grand puppet will cast their unique jutsu, but their standard melee acts the same as their lower leveled counterparts.
I observed this happening originally when the raid points were past the 2 hours remaining mark, but would deal damage correctly with the fresh reset when you could gain the % bonuses still.
Recently, however, I haven't been able to gain experience at all towards my summon due to it not actually dealing damage to the raid point despite it going through the animation.