Does it tell you which “malicious” sites it is blocking? if anything plex related possibly. need to whitelist
Have you checked. the Hosts file on your computer to see if there is anything related to Plex? There should not be. https://www.howtogeek.com/howto/27350/beginner-geek-how-to-edit-your-hosts-file/
I don’t think this is client end related. if it was just the stream then maybe to do with quality settings but since posters and such are loading slow then probably something else network related.
