Prevent tooltip from capturing pointer events

[Xerillio]

I have a window that I'm "hiding" (by changing opacity) in PointerExited and "showing" it again in PointerEntered. This works great for the most part. However, I have a button for which I've added a tooltip, and whenever the pointer enters the tooltip, the window (except for the tooltip) gets hidden and is shown again when leaving the tooltip.

Is there a way to prevent the tooltip from capturing the pointer events or better yet, have it "be part of" the window so the pointer is still considered to be inside the window even when hovering the tooltip?

I've tried disabling the following on the tooltip (FuncUI/F#):

Button.tip (ToolTip.create [
    ToolTip.content "Previous"
    ToolTip.isHitTestVisible false
    ToolTip.focusable false
    ToolTip.isEnabled false
])

This seems to have no effect.