It looks like a component will have a velocity calculated and saved when animated by a sequence during a level save.
RESULT
The object will have a non-zero component velocity.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-126546 in the post.
| 2 | 
| Component | UE - Anim - Sequencer | 
|---|---|
| Affects Versions | 4.26, 4.27 | 
| Created | Sep 13, 2021 | 
|---|---|
| Resolved | Sep 13, 2021 | 
| Updated | Sep 15, 2021 |