Link boundaries don't work with Safari 11.0.1 when using VoiceOver

[afercia]

Noticed while testing #3343

On Safari 11.0.1 and only when using VoiceOver, the boundaries don't work at all for me: no highlighting is displayed on both user names and links. No "link modal" appears.

They work on Safari Technology Preview – Release 43 (Safari 11.1, WebKit 12605.1.12).

I understand this is an edge case and tricky to investigate. However, boundaries works nicely in the Classic Editor so I'm wondering if there's any obvious, easy to spot difference (events or something) in the Gutenberg implementation that prevents them to work correctly.

Screenshots:

[BoardJames]

It still seems to work for me though you have to click twice because the first click moves the box and the second click moves the cursor.

[afercia]

Oh yes clicking on it works (at the second click). But moving the caret from surrounding text within a link doesn't.

[afercia]

Just noticed one more thing not working well when using Safari 11 + VoiceOver that maybe can help understand what's going on. To reproduce:

Move the caret at the end of a paragraph that ends with a link:

Press Cmd + A:

• expected: the paragraph content should be selected
• actual: all the blocks get selected

Even in this case, can't reproduce with Safari Technology Preview.

[jeffpaul]

This ticket was mentioned in Slack in #core-editor by jeffpaul. View the logs.

[afercia]

A few things have changed:

• user mentions don't use links any longer since Insert @username for user mention autocomplete #4444
• more importantly, current Safari stable is 11.1 (which was Safari Technology Preview at the time this issue was created) so now boundaries work when using VoiceOver

I've tested also the boundaries used on bold and italic text, they work correctly.
Closing.