[Bug] Adding an URL icon to the panel strips characters

When creating an URL icon on the desktop and opening it, everything works fine. When adding the same URL icon to the panel and opening from the panel, characters such as %3A get stripped in the browser to just A or %40 to 0, but opening the icon properties in the panel reveals that the URL hasn't changed there, it changes in the browser after being opened.

I'm running:

OpenSUSE Tumbleweed 20220915

Xfce 4.16.1

Mozilla Firefox 104.0.2