Posted on our socials:
In our most recent server update (no game client update needed) we introduced improvements to transition times for all players, especially solo play.
We are now seeing that oftentimes players in parties are arriving at different scenes when transitioning zones. We'll be working to resolve this as soon as possible, in the meantime if you are experiencing this, the temporary work around is to allow one player to go through to the next scene and once they've loaded the zone teleport to them via the party frames located at the top left of the screen.