White overprint elements still visible under overprint preview
Dear Experts,
I meet one issue that white overprint is not working.
Below element was ticked for "Overprint fill",

But when I view it under Overprint preview, the element is still there.

only when I click, click, click to the deepest layer, it disappear.

Could you please explain how to avoid this issue? I just want it should be invisible under overprint view for the items I ticket as overprint fill. Thank you
Best Regards,
Zhang Jia
