VMware Cloud Director 10.5.x
The flickering is caused by two API calls made in quick succession:
The UI momentarily displays data from the first API call, leading users to believe that many events exist, when in fact, the data pertains to all VMs. Once the second call completes, the correct data replaces the incorrect data, resulting in flickering.
This is a known issue and will be resolved in VCD version 10.6.1
Workaround:
Due to flickering it appears that datagrid is not loading the correct events, but it loads the correct events for default last 3 days.