I have several ActorGroup actors baked to sequencers in Unreal 5.8.3. I have those sequencers ‘Auto Loop’ option and ‘indefinite loop’ looping options enabled. While using the play mode in the UE editor, the entire map briefly ‘freezes’ (user input and all animations) at the start of each loop (at the exact same interval) which wasn’t happening in UE 5.6.1.

To test this, in UE’s outliner, I disabled the ‘Auto Play’ option for every ActorGroup sequence in the map and viola- the freezing stopped completely.