been happening to me for the last 2 weeks,
try to change channels or enter a guild town and ending up with a fsod and have to alt+tab+delete to process kill it and restart.
now after yesterdays back up, i just clocked myself taking 3 minutes and 46 seconds just to turn in a quest. literally just sitting in front of the quest giver waiting for the server to catch up and let me turn it in. hits against mobs taking entirely too long to register. kills not counting tword requirements for 4-8 minutes.
about ready to take another half a year break from the game at this point. the game is basically non-playable like this.