Hovering cursor over window menu goes to 'movement' icon

[TheBiggerBadderBear]

Without MyTab in use, when the cursor hovers over the menu at the top of a window, it correctly shows a hand:

With MyTab in use, when the cursor hovers over the menu at the top of a window, it incorrectly shows the 'movement' icon:

I tested this in different systems (SWADE, Degenesis), diffrent browsers (Firefox, Chrome), different types of window (actor, journal) and with many different cursor options. All show the same behaviour.