You've found something "interesting" here regarding Safari. I set the "Hover" state on the "Go To Tumult" button in the Hype app to show a blue color. When, in Hype's "Preview" mode, I went to the Tumult web page & back ("Return" view - in image just below) the button still showed the "Hover" state as it was when we left the original document. The "Hover" state is not being "cleared" (reset) in Safari as it is in Chrome. (Please see image just below.)
Note 1: In my Demos that follow below Hype's blue hover state is not employed - the above test was used to find out what the issues were.
Note 2: You set these "button state" controls in Hype by selecting an element then choose "Show Button Controls" from the "Edit" menu.
Demo Hype Project: HoverTest_JHSv1.hype.zip (24.2 KB)
In the screen shot below this rectangle - "Safari Trigger" - is colored in blue to show its boundaries. You can of course set its color to "None" - or give it "0" opacity - so there is no visual interference with anything below. I found that a tighter rect boundary with the button will not have the desired effect with a fast moving mouse.
"Safari Trigger" rectangle - "Actions" setting.
Note 3: Even though we are using "On Mouse Over" with Action="None" - having no Action at all will not Clear~Reset the "Hover" state for the "On Mouse Over" of the "Go to Tumult" button.
In any event - this is one idea. And it's dead simple.