Tomorrow morning all servers will be brought down for an update at around 8am CET. We expect that this patch operation will take until the end of the morning to complete.
Amongst the changes are the following two items:
Pets and their ability bars will no longer disappear from a player's screen at random intervals.
We have fixed an issue in which players were sometimes able to avoid the instance lock-out timers for certain 6-man instances.
We will keep you informed on the progress of these fixes.
Update at 08:00 CEST: All servers are now down and the patch is being applied.
Update at 10:00 CEST: All servers are back up. Go and fight!