How to reproduce
- Configure Copy & Sync synchronisation, with a Source issues jql: status != "some status"
- Activate comment synchronisation
- Use Jira transition screen with a comment
- Create a source and a target issue that are linked
- Transition the source issue to the status "some status" with a comment in a transition dialog
- Comment is synchronised to the target issue
- Since source issue does not match the source issue jql criteria (status is not some status) comment should not be synchronised