1952843 - lit.dev - The "open popover" button does not have a fixed position when clicked on

Status: NEW

(Core :: Layout: Positioned, defect)

Description

[Raul Bucata]

Environment:
Operating system: Ubuntu
Firefox version: Firefox 136.0

Steps to reproduce:

1. Navigate to: https://lit.dev/playground/#project=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-XG4gICAgICAgICAgICAgIDxkaXYgY2xhc3M9XCJyb3dcIj5cbiAgICAgICAgICAgICAgICA8ZGl2IGNsYXNzPVwiaXRlbVwiPkl0ZW08L2Rpdj5cbiAgICAgICAgICAgICAgICA8ZGl2IGNsYXNzPVwiaXRlbVwiPkl0ZW08L2Rpdj5cbiAgICAgICAgICAgICAgICA8ZGl2IGNsYXNzPVwiaXRlbVwiPkl0ZW08L2Rpdj5cbiAgICAgICAgICAgICAgICA8ZGl2IGNsYXNzPVwiaXRlbVwiPkl0ZW08L2Rpdj5cbiAgICAgICAgICAgICAgICA8ZGl2IGNsYXNzPVwiaXRlbVwiPkl0ZW08L2Rpdj5cbiAgICAgICAgICAgICAgICA8ZGl2IGNsYXNzPVwiaXRlbVwiPkl0ZW08L2Rpdj5cbiAgICAgICAgICAgICAgICA8ZGl2IGNsYXNzPVwiaXRlbVwiPkl0ZW08L2Rpdj5cbiAgICAgICAgICAgICAgICA8ZGl2IGNsYXNzPVwiaXRlbVwiPkl0ZW08L2Rpdj5cbiAgICAgICAgICAgICAgICA8ZGl2IGNsYXNzPVwiaXRlbVwiPkl0ZW08L2Rpdj5cbiAgICAgICAgICAgICAgICA8ZGl2IGNsYXNzPVwiaXRlbSBpdGVtLXN0aWNreVwiPlxuICAgICAgICAgICAgICAgICAgSXRlbSBzdGlja3lcbiAgICAgICAgICAgICAgICAgIDxidXR0b24gcG9wb3ZlcnRhcmdldD1cInBvcG92ZXJcIj5vcGVuIHBvcG92ZXI8L2J1dHRvbj5cbiAgICAgICAgICAgICAgICAgIDxkaXYgaWQ9XCJwb3BvdmVyXCIgcG9wb3Zlcj1cImF1dG9cIj5Qb3BvdmVyPC9kaXY-XG4gICAgICAgICAgICAgICAgPC9kaXY-XG4gICAgICAgICAgICAgIDwvZGl2PlxuICAgICAgICAgICAgPC9kaXY-XG4gICAgICAgICAgPC9kaXY-XG4gICAgICAgIDwvZGl2PlxuICAgICAgPC9kaXY-XG4gICAgYDtcbiAgfVxufVxuXG5jdXN0b21FbGVtZW50cy5kZWZpbmUoJ3NpbXBsZS1ncmVldGluZycsIFNpbXBsZUdyZWV0aW5nKTsifSx7Im5hbWUiOiJpbmRleC5odG1sIiwiY29udGVudCI6IjwhRE9DVFlQRSBodG1sPlxuPGhlYWQ-XG4gIDxzY3JpcHQgdHlwZT1cIm1vZHVsZVwiIHNyYz1cIi4vc2ltcGxlLWdyZWV0aW5nLmpzXCI-PC9zY3JpcHQ-XG4gIDxsaW5rIHJlbD1cInN0eWxlc2hlZXRcIiBocmVmPVwiLi9zdHlsZXMuY3NzXCIgLz5cbjwvaGVhZD5cbjxib2R5PlxuICA8c2ltcGxlLWdyZWV0aW5nIG5hbWU9XCJXb3JsZFwiPjwvc2ltcGxlLWdyZWV0aW5nPlxuPC9ib2R5PlxuIn0seyJuYW1lIjoicGFja2FnZS5qc29uIiwiY29udGVudCI6IntcbiAgXCJkZXBlbmRlbmNpZXNcIjoge1xuICAgIFwibGl0XCI6IFwiXjMuMC4wXCIsXG4gICAgXCJAbGl0L3JlYWN0aXZlLWVsZW1lbnRcIjogXCJeMi4wLjBcIixcbiAgICBcImxpdC1lbGVtZW50XCI6IFwiXjQuMC4wXCIsXG4gICAgXCJsaXQtaHRtbFwiOiBcIl4zLjAuMFwiXG4gIH1cbn0iLCJoaWRkZW4iOnRydWV9XQ
2. Click on the "open pop-over" button located in the "Result" tab
3. Observe

Expected Behavior:
The button has a fixed position

Actual Behavior:
The button disappears

Notes:

• Reproduces regardless of the status of ETP
• Reproduces in firefox-nightly, and firefox-release
• Does not reproduce in chrome

Created from https://github.com/webcompat/web-bugs/issues/149765

Comment 1

[Raul Bucata]

Attachment: Chr vs FF

Comment 2

[BugBot [:suhaib / :marco/ :calixte]]

Since nightly and release are affected, beta will likely be affected too.
For more information, please visit BugBot documentation.

Comment 3

[Dennis Schubert [:denschub]]

This is a testcase, not a real site, so let's treat this as a core bug.

Comment 4

[BugBot [:suhaib / :marco/ :calixte]]

The severity field is not set for this bug.
:TYLin, could you have a look please?

For more information, please visit BugBot documentation.

Comment 5

[Ting-Yu Lin [:TYLin] (PST, UTC-7)]

mozregression finds this bug to be a regression bug 1748891.

Note: "open pop-over" button can re-appear after scrolling the container horizontally.

Comment 6

[BugBot [:suhaib / :marco/ :calixte]]

Set release status flags based on info from the regressing bug 1748891

Comment 7

[BugBot [:suhaib / :marco/ :calixte]]

Set release status flags based on info from the regressing bug 1748891