Hover over to child dashboard in Singlestat is not working in version 7.4

The singlestat panel has the child dashboard links, hovering over to the single stat panel in 6.4 version, it shows the tooltip display message as “Click here to go to +title of the link” and when the tooltip in clicked anywhere inside the panel, it takes to child dashboard. After upgrading to the Grafana version 7.4 from 6.4. i dont see the tool tip message Also, when i click inside the panel, it is not taking me to the child dashboard. Hovering over to top left “i” and clicking the link works as usual.
is this a bug ?