Increase pbm starting deadline - percona mongodb

I am trying to use s3 as storage for percona mongodb cluster. However backup keeps failing with “starting deadline exceeded” error ( bug details [K8SPSMDB-660] backup error - starting deadline exceeded - Percona JIRA) .as a workaround I increased the limit in the source code as following

5. const (
6. // pbmStartingDeadline is timeout after which continuous starting state is considered as error
7. pbmStartingDeadline = time.Duration(40) # changed from 40 to 280
8. pbmStartingDeadlineErrMsg = "starting deadline exceeded"
9. )

Even after increasing deadline limit, the backup keeps failing after 40 seconds. What else need to be changed here?