Originally Posted by Nacht

Could be a coincidence that it happened right after the patch, but Vashj had a bug last night. In phase 3 when she got to ~35%, her health suddenly jumped up to ~80%. Phase 3 continued as normal. She did not go to phase 2 after we got her back down to 70%. She never evaded or actually reset, just regained nearly 50% of her health. It was very strange.