Mouse over highlight problems

Hi,

I am recently having problems with the mouse over and the selection parameters.

Sometimes, without any apparent reason, the highlight selection on rollover stops working and, for example, when I double-click a Sketch it doesn't go to the "Edit Sketch in task environment". It just does nothing. It is very annoying to work like this, having to go to contextual menu to edit EVERYTHING, even a dimension...

I think the Selection preferences are as they should be.

Thanks in advance!