The Stone Sheath (Bugged?)
Content Designer
https://forum-en.gw2archive.eu/forum/game/story/BUG-The-Stone-Sheath/first
TL:DR It’s fixed in the 10/1 update.
I had the same issue, but succeeded the second time anyway. I think the important part is that you don’t get into the surface-swimming state (no skillbar) when you try to get up on the land, although I haven’t decently tested that theory.
It’s still bugged. Just ran it twice as an engineer and cannot complete it as the sheath dissapears when I hit the escape point. Sigh.