4.12 Sequences freezing on older iPad randomly

Hey there, I have a scene where you tap to move to different ‘stations’ and when you get there you overlap a trigger volume that plays a sequence specific to that station. Each sequence includes some audio, several cameras, object motion, and for some video plays. I have an issue where the older iPads will bog down and freeze up the sequence, even though the engine is still running (looping animations are still playing, sequence just stops at some point). It seems a bit better if I take the audio out but not perfect. It’s not freezing on keyframes - anyone else have these issues?