Hide Forgot
The service response time gadget can draw three lines - min, max and avg. If there is a point where those charts are overlapped than the hovering can malfunction and not display details.
Don't believe there is anything we can do about this for 6.0, as it is a limitation of the chart widget being used. For 6.1 we plan to migrate to Uberfire, so we can revisit what chart library we use, to see if there is a better approach.
*** Bug 1053625 has been marked as a duplicate of this bug. ***
Gadget Server is being replaced by the new RTGov UI