[aria-*] attributes do not match their roles when Box is set to Center

[arnelap]

With a Boxzilla box set to show centered, Google PageSpeed will show an Aria / Accessibility error:

[aria-*] attributes do not match their roles when Box is set to Center
body.home > div#boxzilla-overlay-23
<div aria-modal="true" id="boxzilla-overlay-23" class="boxzilla-overlay boxzilla-23-overlay" style="">

The aria label is applied to the overlay, instead of the box itself and looking at https://developer.mozilla.org/en-US/docs/Web/Accessibility/ARIA/Attributes/aria-modal I believe it should be applied to the box instead.
However, I tried moving it to the box and I still got the error from Google PageSpeed insights when the box is centered.

Removing the this.overlay.setAttribute('aria-modal', true); when box is centered "solved" the warning...

Now, do you want to be compliant with Aria, or do you want Google to think you are?