Hi, change the images tag to multi and disable updateStrategy:
https://hub.docker.com/r/percona/percona-server-mongodb/tags?page=&page_size=&ordering=&name=multi
image:
repository: percona/percona-server-mongodb
tag: 6.0.15-12-multi
backup:
enabled: true
image:
repository: percona/percona-backup-mongodb
tag: 2.4.1-multi