The sequencer is not working well in packaged data.

I’m using sequencer function to make event scene, but skeletal mesh is not working well in sequence.

It is working in view port well, but it is not in packaged data like below.

Evertime:
The skeletal mesh’s an z coordinate shift.

High probability:
The skeletal mesh disappear.

Low probability:
Does not move according to pre-specified coordinates.

There is a scene where the skeletal mesh crawls from the wall to the ceiling, but after going to the ceiling, it fell to the ground in the middle of the scene.

I am having trouble finding the cause.
Is the behaviour of the sequencer function unstable to begin with?
Any solutions or clues would be appreciated.

Thank you.