The tooltip that is shown when hovering over different Items while "View event information on mouseover".  is enabled becomes unresposive after using the select tool. Strangely it seems to start to get unresponsive just after using the "Select range." tool for the second time. So the somewhat lengthy way to reproduce it for me is:

• load a qml trace
• enable "View event information on mouseover"
• hover over some items in the time line view
• click "Select range."
• hover over the time line view
• deselect "Select range."
• hover over the time line view (the tooltip now still gets updated as expected)
• click "Select range." again
• hover over the time line view
• deselect "Select range." again
• now the tooltip becomes stuck

And after clearing the view and reopening the same qml trace I get no tooltip anymore no matter what I try.