Hey!
You are doing ` /p setwarp [name] 0 ` ?
Be sure you do not have an existing warp as well as actually be in your chunks.
I just retested it by making a warp -> /p setwarp abctesting1 0
And it worked fine.
If it still does not work, I would suggest trying to add an icon as well so for example -> /p setwarp [name] 0 dirt
And if that too does not work, create a ticket here: https://manacube.com/support/