I am reporting a layout bug regarding the text selection tooltip (the search/copy popup menu) in the current stable build of Opera One. The positioning of the popup appears to be broken by page scaling, shifting incorrectly based on whether the page is zoomed in or out.

When highlighting text on a webpage, the popup menu shifts to the wrong position if the zoom level is altered from the default 100 percent. Because I use a large screen, I keep my browser set to a standard 125 percent zoom as my daily default, meaning this bug is constantly present for me.

The tracking behaviour changes depending on the zoom scale:

At 100 percent zoom: The popup positions itself perfectly directly above the selected text.

Above 100 percent zoom (e.g., 125 percent): The popup consistently spawns offset to the bottom right of the selection.

Below 100 percent zoom: The popup incorrectly shifts to the top left of the selection.

The moment any scaling factor is applied, the coordinates break, making the menu awkward to click and causing it to overlap other page content.

Try it by yourself:
Open any webpage.
Change the browser zoom level (try 125 percent, then try less than 100 percent).
Highlight a word, phrase, or sentence at each zoom level.
Observe the placement of the search/copy popup menu.

Expected Result: The popup should always appear directly above the selected text, maintaining its relative position regardless of the layout scale.

Actual Result: The popup tracking breaks, spawning bottom right when zoomed in and top left when zoomed out.

Is anyone else using page scaling (zoom) experiencing this tracking issue?

Opera Version: 133.0.5932.60
Update stream: Stable
System: Windows 11 64-bit
Chromium version: 149.0.7827.201