A hotfix is available to solve this particular issue and can be downloaded by the link below.
This hotfix is cumulative and compatible with Veeam Monitor version 188.8.131.521.
Make sure that you are running aforementioned version. You can verify this by going to “Options” -> “Server Settings…” and noticing “Collector version” on “Collector” tab of “Veeam Monitor Server Settings” window. Install the hotfix following instructions below:
Delete "Rtcounters" and "Histcounters" values from this registry key HKEY_LOCAL_MACHINE\SOFTWARE\VeeaM\Veeam Monitor for VMware\Service;
Stop the "Veeam Data Collector Service" service;
Overwrite all files in Veeam Monitor installation folder by the files from the hotfix archive. Make sure that you are using correct source folders (64bit folder for 64bit operating systems or 32bit folder for 32bit operating systems);
Once Step 3 is done then execute the SetPerHostCollectionMethod.reg file from archive and make sure that all changes have been applied successfully;
Start the "Veeam Data Collector Service" service.
Once you have applied the hotfix then Veeam Monitor will spend some time gathering historical performance data from source VMware vCenter server or VMware host before you see the performance graphs updated. To obtain the hotfix please follow the link below:Download