Walk up stairs animation on level sequence

Since you are doing things in sequencer, why not just teleport the character at the starting position of where it left off?
it would be much easier, since the 1st example works fine…

This would basically be equivalent to properly setting up root motion - which I’m not sure your animation is properly setup for by looking at what you are showing.

The other thing to check is that the animations can actually properly cycle without hitches.
you may be better off taking it to something like Blender and creating a smooth animation that covers however many steps you need for the footage instead…