hovering tooltips persist and clutter the window

When hovering w/mouse over code, a descriptive tooltip appears. However, more often than not these tooltips persist on the screen and won't disappear before the whole editor is closed down. The tooltips also persist on screen when the creator window is minimized. The screen eventually starts filling up with the tooltip boxes, and the creator has to be restarted to clear the screen. Image attached.

Edit: same bug is still around with version 2.0.94 (2.1.0-pre-rc). Just open any file in the editor that can reference class source, and move the cursor up and down the screen - tooltips start to clutter the screen, and won't fade away. Some of them of course do, as is intended, but it doesn't take too long until the screen is pretty much blocked. Another image attached.

This does not happen with the Qt Creator 2.0.1 - but that one lacks the better qml support of the newer creators.