Open file with layout:

mine at the moment is dual pane with two tabs on either side.

 

Click on a tab that isnt displayed.

IQ thinks I have done a click and drag with the consequence that the tab will often move position:

 

 

Note that the move symbol -- as in screenshot -- only shows if you pause the mouse or move it slowly.

What often happens next is that the 'Budgets' tab moves to the left of the other (half-visible) tab -- note that this happens a few seconds later. This may depend on how the mouse is moved: I tend to click, then move mouse in the direction of bottom-left of screen.

(Not a big deal but disorientating and creates a poor impression.)

 

This happens only once on each side of the dualpane, and cannot be reproduced until you restart the file.