This seems to be a regression of [Link Removed]
RESULT:
The sequence will be dirtied, and there will be a dialog asking for the file to be checked out after the render completes
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-135187 in the post.
| 0 | 
| Component | UE - Anim - Sequencer | 
|---|---|
| Affects Versions | 4.27, 5.0 | 
| Target Fix | 5.0 | 
| Created | Nov 16, 2021 | 
|---|---|
| Resolved | Nov 19, 2021 | 
| Updated | Jan 26, 2023 |