SOLVED!!
Hey, dont know if its worty yet but I solutioned that issue (might a). When you hover the button another widget pops up right? Under the mouse cursor, right? When this new widget pops up, it triggrers the button on unhovered event making the new widget close, since the mouse still over the button, it triggers the button hover event again, and it cicles very fast making the flickering occours.
I got it making a tool tip. solved by going on the tool tip widget root and setting the: VISIBILITY: Not hit testable (self & all children).