Describe the problem

I've seen TestChangefeedRestartDuringBackfill flake recently (CI failure here). It's possibly fallout from #73876. This issue tracks the investigation.

To Reproduce

dev test pkg/ccl/changefeedccl -f=TestChangefeedRestartDuringBackfill -v --timeout 10s --ignore-cache --show-logs

Jira issue: CRDB-12455