Draw Frame around selected windows while cycling high CPU usage/flicker

This might be a bit of an edge case, but if you have this option enabled and hover over the very extreme edge of your screen where the window list panel item is, xfwm4 will keep drawing/un-drawing the window frame preview and it will chew up a lot of CPU time.

Ideally, I think it would just draw it once, but what seems like is happening is that it goes to draw the border, which goes under the mouse cursor, which sends a signal that the border draw is no longer being requested, so it undraws, which makes the mouse cursor be back on top of the target to start drawing the window border, etc etc etc.

Video attached for STR:
str