Jellyfin causing issues with Plex and Firefox

Hi all, I am running my media server on Windows 11. I originally used Plex as my main media server and Firefox as my primary web browser, both without any issues. I wanted to try the new version of Jellyfin, so I installed it on my fresh Windows system. This led to a very specific and recurring problem: both Plex stopped connecting and Firefox kept erroneously reporting that it needed a network connection, despite my having a stable internet connection. I had previously experienced this issue, which led me to reformat my computer, assuming it was a bug or virus, a process which initially solved the problem. However, upon this recent reinstallation of Jellyfin, the problems for both Plex and Firefox reappeared within a day. I uninstalled Jellyfin, and the connectivity issues immediately went away. My question is has anyone else experienced this issue? And to be clear, Jellyfin was not exposed to the outside network (no port forwarding was enabled).