Detect pointer events on different panel during pointerdown?

I’m trying to show tooltips (via OnPointerEnter) on other panels while dragging an ui element and can’t get it to work. Focusable is disabled for all elements and everything works while no button is pressed or I stay on the same panel.

This is a bug. Navigation was broken. https://issuetracker.unity3d.com/issues/gamepad-left-stick-is-not-working-with-modified-ui-builder-components