I don’t know if it was designed to do this, but after finishing Clockwork Chaos events in Blazeridge Steppes, leaving the zone for about 30 minutes, and then coming back to the same zone, players are sent to a new zone instance.
Players were expecting the Shatterer pre-events to start, but that pre-event is in the instance where Clockwork Chaos events were done — the zone instance where no one can re-enter — while the same pre-event won’t be up for another 2 1/2 hours in the new instance.
Basically, my home server (Blackgate) has two instances of Blazeridge Steppes. Players are not landing in overflow zone, and this anomaly can happen to another zones that had finished Clockwork Chaos (e.g. Sparkfly Fen, Frostgorge Sound and others).