This issue is present in versions 4.2.8 & 5.0.2.

There are random breaks in the data view of certain dashboards, wherein the colour-coded set of items being monitored does not appear (see attachsments for typical case).

If you hover over parts where breaks in the graph occur, you are still able to see values for the items being monitored. Also, there are no breaks in 'Latest View' for any of the collected data (items) that populate the dashboard.

Adjusting the time interval view has no impact on the problem. It appears to occur in dashboards where there are >4 items being displayed. Dashboards pulling in less data do not appear to be affected.

There are no log errors for any of the items that populate the problem dashboards.