Non-recommended VMWARE metrics polling interval can cause this issue. For example. VMware time interval set to 30min (1800) can cause this issue.
The recommendation is 10 minutes:
In the VMWARE probe configuration please decrease the interval time from 30min(1800). to: 10 min(600).
After this run a report over the period gathered with 10 minutes interval and check if the result of the report is accurate.