Hey Paul,
Sounds like the binding between the track data and the actor got lost. You might be able to rebind it by right clicking on the actor track and choosing “Assign Actor” and then picking the corresponding actor.
Also, did you record as a spawnable or a possessable? The default is recording by spawnable, which means the level sequence asset will store the actor to spawn. The alternative is to record to tracks that will possess an existing actor in a level. You could try and record as possessable if you haven’t already and see if that works. If you need to convert that to a spawnable, you can do that by right clicking on the actor track after you’ve done the recording.
Hopefully one of those works. If not, can you send along a screenshot of your tracks?