System cursor is not hiding in Mac Chrome web player

I have a custom cursor specified which looks cool when it works, but in Chrome for Mac at least it doesn't- I have the default system cursor and the larger custom cursor trailing behind it, which is ugly and distracting. It works in Safari and Firefox; and I notice the hardware cursor hides and custom cursor shows up before the web player has finished loading.

Is there a fix for this or is it just a known bug that nothing can be done about? Should I make a fake cursor and always Screen.showCursor = false instead of using Unity's built-in custom cursor?