Unrealistic "Seconds behind master" value

== Unrealistic "Seconds behind master" value reported in "Show slave status"
== It shows a very huge value.
== This happens when we check seconds behind master exactly at the time after Binary log rotation on the master.

Able to reproduce the issue on 10.2.38.
Based on the release notes, 10.2.39 was released yesterday. But the binaries are not yet available for download. So, couldn't check it on 10.2.39
[+] https://mariadb.com/kb/en/release-notes-mariadb-102-series/