Don’t know if its specific to this zone, but seems that me and others are experiencing this issue. Earlier today it happened when guildies and I were doing the bounty here, our gw2 would freeze for maybe a second or two then work as normal.
Now, while I’m doing map completion it is happening again, and others in map chat are reporting the same issue.
tl;dr In Brisban game seems to freeze for 1-4 seconds every now and then, and is being reproduced(others are freezing as well).