Hi @rfaraj !
I believe it is this issue (still open): [K8SPSMDB-638] backup can fail with "starting deadline exceeded" even if it finishes in PBM - Percona JIRA
We already had one try in fixing the same issue, but it is still not fixed.
I’ll leave a comment with a link to this discussion and if you wish you can “follow” the ticket in Jira to get updates.
Kind regards,
Tomislav