So I was fighting Harlequin while using Assassin's Greed in a Rift Battle. Harlequin was nearly at zero, then used Diamonds are Forever on me, and was trying to use Ultimate Showstopper after that. Assassin's Greed's SA killed her (and made her sprite darken) before Ultimate Showstopper could connect, and I flew through Harlequin to land on her right side. Harlequin tried to dash left to use Ultimate Showstopper, but I guess because I was to her right, just kept running left indefinitely. No further inputs could be given to fight and Harlequin's partner didn't tag in. I could pause and quit the battle after that. I think the cause here was Cerebella dying when she activated her second blockbuster and while I was still flying from the Diamonds are forever, and passing through her before the blockbuster animation for the BB3 kicked in. If it matters at all, it was on the Tazer node, with a Blockbusted catalyst.