Tracking Revenant's Control Rig in Sequencer Loses Eye Effect?

Hey everyone! I’m not sure if this was the right category to use or not, but I am having a weird issue with UE5.1 Sequencer.

I am trying to make a short film with Revenant as the main character, using the Western Desert Town asset pack (nabbed it back during Free for the Month). There’s a scene where I wanted to track his Control Rig so I can do some facial and head animations; however, as you can probably see in this video, as soon as I go to track it, his flaming eye effect just disappears completely, and nothing I do will bring it back except deleting the character mesh and reapplying it to the scene, losing all keyframes. Does anyone know why this happens, and how to prevent it?