After you finish an echo you get a big button to spawn a portal.
Spawning this portal takes your Z axis into account, hence if you click it while at a sufficient height from Fury Leap (Primalist skill) you cannot enter the portal and your echo is soft locked (have to relog).
If you completed an echo you can get the green portal to spawn by clicking the button at top or using your personal teleport button/hot key on your bar. You shouldn’t be able to be soft locked.
Though being able to spawn a teleport mid flight should be something that is addressed.