Alter Aeon FAQ (Frequently Asked Questions)

FAQ 19.2 - Waypoints are not supposed to cross planes

While waypoints are convenient, they are very explicitly not intended to
allow travel between planes.  If a player finds themselves stranded on a
remote plane, they must find some other way out than a waypoint.  Recalling
and portals are both fine.

There are two exceptions to this rule:  the hall of boards, and clan areas.
It should always be possible to waypoint to these areas and back to your
starting location.  Note that this will not allow you to use the hall of
boards or clan areas to bridge between planes.

Both exceptions are for non-gameplay areas that allow players to communicate
and interact with each other.