The OST plugin can't be greater than the DR. This is what is contributing to the interrupts that are produced. The DR version can be higher than the plugin but not vice versa. Best practice when possible is to have it match one to one but can't always have that.
Please see the related error:
501368 WARNING 2018-09-17 11:52:02 Connection from OST/RDS client "" aborted.
501367 CRITICAL 2018-09-17 11:52:02 Found mismatch in system software version with peer "". Backup or replication on some or all target containers would be stalled.
The recommendation is to upgrade the DR a version greater than the protocol plugin