Not my guild, but is anyone else experiencing similar latency issues in 25 man settings? Sometimes when I hit a button it takes ~400 ms before I get a response. This is extremely disrupting for GCD capped specs (Combat Rogue with T15 4-piece) or specs that require split second reactions (example: Fire Mages reacting to Heating Up procs).
My latency is around ~100 ms and my FPS stays at 50+. This issue only happens on 25 man, including LFR. I'll try to upload my own video. Fixes or suggestions?