Backport of "concat: Properly propagate seqnum of segment events" into 1.18
Backport of !871 (merged) "concat: Properly propagate seqnum of segment events".
Commits:
- 6bd27594 concat: Properly propagate seqnum of segment events
Backport of !871 (merged) "concat: Properly propagate seqnum of segment events".
Commits: