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Test: APG Editable Combobox With List Autocomplete Example (VoiceOver (macOS)/Safari)

Expectation: aria-activedescendant attribute: MUST convey when the referenced element changes - applied to the combobox role

Grading Note: There is no known/documented support. There may still be support for this expectation, but it is undocumented. If this is the case, please report this issue.
AT NameVoiceOver (macOS)
AT Version13.5
Browser NameSafari
Browser Version16.6
OS version13.5

Commands and Output

These are specific commands used to access the target element in the test, along with the resulting output.

next_option (Down arrow)failcontents of listbox were skipped entirely
next_option (Down arrow)failnothing was conveyed even though visually options were selected