Great, thanks for letting me know that resolved the issue for you.
Yeah, I’ve created this JIRA for the specific issue with PreviousSubStepPosition not being updated when FAnimMontageInstance::SetNextPositionWithEvents is called. I’ll also have to discuss with the Sequencer team what they want to do about the remaining issue (notifies that sit at the very end of the animation that could be missed in the frame that the loop happens). Any fix there will likely be more involved so it could take a while.