Ah right.
Well what I think is if this is happening to only you or existing players, it might be happening is you possibly used another resource before or something, and it improperly set the spawn location, in which case, you need to edit the account data on the accounts to clear the spawn location and such.
If not, then I'm not sure, sorry.
Also, have you got any sort of admin panel to warp you anywhere, where you can then know you're on land then log out, then log in and see if you respawn? If you have tried that, again, I'm sorry, but I don't know.