I have a div with overflow-y: scroll, when I put my mouse on the div (and when there is a need for overflow), the scrollbar appears and works perfectly. When I move the mouse out of the div the scrollbar hides away.
I'm on Firefox 128.9esr(64-bit) for Oracle Linux 9.3, it's an Angular 17 application, and I work in a VM. It seems to be working on Chrome based browsers.
I can't reproduce the problem on other computer/JSfiddle and I work in closed environment on this project.
Everywhere it says that the scrollbar should always be visible when it is set to overflow: scroll (even when the mosue is out of the div), but that's not the case. When looking on SO, I found similar problem from MacOS users, and it seems to stem from the OS configuration. Firefox's developer tools doesn't display any warning around the class.
What bother me is that appart from how it shows, the scrollbar behaves normally. I need to have the correct behavior and I'm out of debbugging ideas. What other parameters could influence this behaviour ?