[Chrome] "mousemove" event not firing when the mouse is on an iframe (cross-domain?)

[cridus]

I have opened a pdf file in Chrome in an iframe, and the resizing stops when I drag over it. "pointer-events: none" isn't working.
I also tried to put a transparent absolutely-positioned div over the iframe but the event still doesn't fire.
The only ugly workaround I found was to hide the iframe when the drag starts and show it again when it ends.
Works fine on Firefox and EDGE.

I don't know when I'll have the time to make an example. Maybe in two days.