Just getting started with animation in Daz Studio. Experimenting with a scene that has two main characters and a background character. Mostly going OK but running into a strange problem. If I go into the timeline and change the background character's pose - in this case moving her hand forward, then a few frames later moving it back - Daz stops including all the other frames in the playback. It only goes to the few frames where the background character's hand moved - the other 70+ frames are still there, but they somehow get excluded from the playback. Pose changes to the two foreground characters don't cause this problem.

Obviously I must be doing something I am not aware of.

Would appreciate any help or suggestions.