What is the issue with the HTML Standard?

Step 15 in "show popover", step 12 in the dialog.show() method steps and step 20 in "show a modal dialog" will all return null because "topmost popover ancestor" and "nearest inclusive open popover" both require the popover state to be "auto".

This goes against the behaviour expected by WPT (e.g. https://wpt.live/html/semantics/popovers/popover-top-layer-nesting-hints.html) and the behaviour of all major implementations.