Created attachment 189019 [details]
Image showing the visual glitch in the location bar.

SUMMARY
When clicking the icon to edit the location, sometimes the location bar briefly glitches, showing a blue highlighted box with the check mark for confirming the edit in the middle of the box. It seems to happen somewhat more often the first time the location is edited in a given window.

STEPS TO REPRODUCE
1. Open Dolphin
2. Click to edit the location
3. If the glitch does not happen, confirm the edit and click to edit again.
4. Eventually the bug will happen.

OBSERVED RESULT
The space between the breadcrumbs and the end of the location bar is filled with a highlighted blue box. In the middle of the box is the check mark icon that confirms the edit. After a few frames it disappears.

EXPECTED RESULT
The location editing controls should appear without any graphical glitches.

SOFTWARE/OS VERSIONS
Operating System: EndeavourOS 
KDE Plasma Version: 6.5.5
KDE Frameworks Version: 6.22.0
Qt Version: 6.10.1
Kernel Version: 6.18.6-arch1-1 (64-bit)
Graphics Platform: Wayland

ADDITIONAL INFORMATION
The glitch seems to be caused by the check mark button momentarily expanding to occupy the entire available space.