In the Threat Event's dashboard, there are some events that become from a workstation, which date is wrong. The event received time isn´t even closely that the event generated time.
I forgot to include, check the Date ... Is the date/time stamp on the workstation's On-Access logs & Access Protection logs correct? If that's correct, it may be a DB record issue.
If the workstation's date/time are correct; try reinstalling the agent.