Popover tips not affected by tip view modifiers

Tips presented using the popoverTip view modifier can't be styled using other tip view modifiers (as of beta 8).

For instance, the last two modifiers don't have any effect here:

Image(systemName: "wand.and.stars")
    .popoverTip(tip)
    .tipBackground(.red)
    .tipCornerRadius(30)

It will look like this:

Whereas applying the same modifiers to a TipView changes its look:

TipView(tip, arrowEdge: .bottom)
    .tipBackground(.red)
    .tipCornerRadius(30)

Is this intended behavior? How can we change the appearance of popup tips?