Bug 515828 - Scrollbar behaves weirdly when the cursor holding it goes out of the scrollbar's area
Summary: Scrollbar behaves weirdly when the cursor holding it goes out of the scrollba...
Status: RESOLVED UPSTREAM
Alias: None
Product: kwin
Classification: Plasma
Component: general (other bugs)
Version First Reported In: 6.5.5
Platform: CachyOS Linux
: NOR normal
Target Milestone: ---
Assignee: KWin default assignee
URL: https://bugzilla.mozilla.org/show_bug...
Keywords: usability
Depends on:
Blocks:
 
Reported: 2026-02-10 17:07 UTC by Fernando Marcelino Muniz
Modified: 2026-02-10 20:40 UTC (History)
1 user (show)

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Description Fernando Marcelino Muniz 2026-02-10 17:07:30 UTC 
STEPS TO REPRODUCE
On this site, hold the scrollbar of "Platform:", then move the cursor away from the list.

OBSERVED RESULT
The scrollbar teleports to the bottom the moment the cursor (while holding the scrollbar) goes out of the list.

EXPECTED RESULT
It should behave like it does with all other scrollbars.
(Solving this on the site's end wouldn't truly solve the issue)

SOFTWARE/OS VERSIONS
Operating System: CachyOS Linux 
KDE Plasma Version: 6.5.5
KDE Frameworks Version: 6.22.0
Qt Version: 6.10.2
Kernel Version: 6.18.9-2-cachyos (64-bit)
Graphics Platform: Wayland
Processors: 8 × 11th Gen Intel® Core™ i5-11300H @ 3.10GHz
Memory: 9 GB of RAM (8.1 GB usable)
Graphics Processor 1: Intel® Iris® Xe Graphics
Graphics Processor 2: NVIDIA GeForce GTX 1650
Manufacturer: LENOVO
Product Name: 82MG
System Version: IdeaPad Gaming 3 15IHU6

ADDITIONAL INFORMATION
https://bugzilla.mozilla.org/show_bug.cgi?id=2014504#c2
Comment 1 Zamundaaa 2026-02-10 20:40:34 UTC 
KWin doesn't render scrollbars, this too is a Firefox (or maybe GTK) issue.