As Nimrod said, The restart does not happen because of the PVC check, it's just a print when we check if there is a need for upgrade.
In general, a restart happens when a container in a pod dies.
More information would help us understand what is the reason for the restarts:
* description of the failing pod
* logs of the pod before the last restart (-- previous flag).
* Events - `oc get events --sort-by lastTimestamp`
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHBA-2020:1437