Zerto has identified a data consistency issue introduced in the ZVR 6.5 version. While the issue is only triggered under very unique circumstances of a nested Bitmap Sync. Zerto is taking aggressive action to resolve this issue
Zerto has fixed this issue in the ZVR 6.5U3 update (now available on myZerto Portal) and strongly recommends that all customers currently running an earlier version of ZVR 6.5 upgrade to ZVR 6.5U3. To ensure data consistency, upon upgrade, the ZVM will automatically force sync all VPGs replicating out of a VMWare/Hyper-V source site that was on ZVR 6.5U0, 6.5U1, or 6.5U2.
Customers upgrading from a version 6.0 or older are unaffected by this issue.
It is important to note that if a MOVE, FAILOVER LIVE, or CLONE operations were used with ZVR 6.5U0, 6.5U1, or 6.5U2 on a production VM, you are encouraged to check the consistency of this VM. If you would like additional guidance please refer to Release Notes and open a Support Case.
Please review the ZVR 6.5U3 Release Notes for more information and instructions.