Tooltips only appear once per page load in Safari

[neildaniels]

Describe the bug
For each Tooltip example, a tooltip will only appear once per page load in Safari. And in the case of examples with multiple examples (like the directions example), only the first item hovered will show a tooltip. Afterwards, the other items won't show a tooltip.

To Reproduce
Steps to reproduce the behavior:

1. Go to Tooltip with no delay in Safari
2. Hover over the example
3. Tooltip appears
4. Mouse outside of the item
5. Tooltip hides
6. Mouse over the example again.
7. Tooltip won't appear.

Expected behavior
Tooltips should appear consistently.

Desktop (please complete the following information):

• OS: macOS
• Browser: Safari
• Version 13.1.1 (15609.2.9.1.2)

Additional context
Works fine on Chrome. I'm not sure when this regressed in Safari. They used to work fine.

[smockle]

They used to work fine.

I started bisecting this. I was able to confirm the issue repros as far back as early September 2019 (3ad0b9f). When I tried to go further back, the project would not build on my machine.

[simurai]

Tested this in a CodePen: https://codepen.io/simurai/pen/54f53be160a122b767cce3bd4a963ef1. It seems to work fine.

Maybe an issue with rendering the demo in the docs?

[neildaniels]

For whatever it's worth: the labels in the docs work correctly on the Safari 14 beta (Version 14.0 (15610.1.20.4, 15610)).

[smockle]

For whatever it's worth: the labels in the docs work correctly on the Safari 14 beta (Version 14.0 (15610.1.20.4, 15610)).

They also work in Safari 14.0 (16610.1.21.1.2) (the version installed in macOS Big Sur 11.0 Beta (20A5323I))

[github-actions]

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