Can't drag cards in Vivaldi

[Svashtar]

I am using fizzy.do, which probably uses this repo, too - but I did not cloned it and tried locally...

For some reason, most of the time I can't drag cards on Vivaldi. I have tried other browsers , and it works fine there (Chrome for example). I thought it is maybe a combination of Extensions, but even after I've disabled all of them, still can't drag cards.
I have also disabled Vivaldi's content blocker.

There are no errors in the console - it just doesn't register the click-drag I guess.

Just wanted to let you know, and if there is any remote possibility to make it work, I would really appreciate it.
It drives me crazy sometime and then I just open Chrome and do it there.

[fev4]

I'm using the self-hosted version of Fizzy on Vivaldi and I'm experiencing this issue too.

System & Build

Version: 7.7.3851.67 (Official Build) (64-bit)
Chromium Version: 142.0.7444.267
Channel: Official Build
Platform / OS: Windows 11 Version 25H2 (Build 26220.7523)
Executable Path: C:\Users\<user>\AppData\Local\Vivaldi\Application\vivaldi.exe
Command Line: "C:\Users\<user>\AppData\Local\Vivaldi\Application\vivaldi.exe" --origin-trial-disabled-features=CanvasTextNg|WebAssemblyCustomDescriptors --restart --restore-last-session --flag-switches-begin --flag-switches-end

Update Info

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36
Revision: 58a1037f6bb682a68c1b757ba0a70826ea67c8a1
Profile Path: C:\Users\afvas\AppData\Local\Vivaldi\User Data\Default
JavaScript: V8 14.2.231.22