The event Mouse Begin Cursor Over/End are in the board tiles blueprint. I have no idea why it is hovering on and off like a Tick event (see GIF). I would really appreciate if anyone can explain what’s causing this issue?
Set the tooltip to be Not Hit-Testable. When it shows up, it eats up the mouse and the tile underneath receives End Cursor Over, which hides the tooltip, so the tile receives Begin Cursor Over which shows the tooltip and again and again. Feels like Tick, indeed.
Thanks for the explanation! That makes sense now.
I tried setting the widgets visibility as you said but it didnt work 
. I tried both options “Not Hit testable (self)” and “Not Hit testable (self & all children)”. The result is still the same as the original GIF above.
Edit:
In my widget blueprints, previously I had an Event Tick for the tooltip to follow my mouse movement (like below)
I’ve already unplugged the event tick and the flickering still happens (see GIF below)
It looks like the ‘flickering’ is not caused by the widget visibility. Below is the screenshot of my Tile blueprint events for OnBeginCursorOver and OnEndCursorOver
我也遇到了同样的情况，请问您解决这个问题了吗？