Bug 244090

Summary: AX: Safari + Voiceover don't read some ShadowDOM elements's aria-label if there's a aria-modal=true
Product: WebKit Reporter: GoOz <gooz>
Component: AccessibilityAssignee: Nobody <webkit-unassigned>
Status: NEW ---    
Severity: Normal CC: andresg_22, karlcow, rik, webkit-bug-importer
Priority: P2 Keywords: BrowserCompat, InRadar
Version: Safari 15   
Hardware: Mac (Apple Silicon)   
OS: macOS 11   

Description GoOz 2022-08-18 08:59:54 PDT 
Reproduced on Safari 15.6 & MacOS 11.6.8 and 12.5

Testcase: https://codepen.io/GoOz/pen/MWVZXZQ

Actual results:
If there's an aria-modal attribute set to true somewhere on the page, aria-labels from shadowDOM elements outside the modal element OR inside it but with the aria-label inside its own shadowDOM won't be read by Voiceover.
Removing the aria-modal="true" attribute will read all of them but that's not an option for the sake of a11y.

Expected results: 
Voiceover should read shadowDOM elements aria-labels

Possibly related to https://bugs.webkit.org/show_bug.cgi?id=174667
Comment 1 Radar WebKit Bug Importer 2022-08-18 09:00:05 PDT 
<rdar://problem/98834532>