Reloading save game resolves the issue for the battle I had the issue.
Details I can recall:
Was playing for about 1.5 hours, did some quick save / loading, probably max of 10 during that play time period.
Was in a long battle with Dallis, though it had occurred several other times (like withermore jar skeleton fights).
I play with 3 summoners, 1 poly, so I summon A LOT of totems throughout a battle.
