[Blissey]

You can go into the Lispool summoning door without having Summoner equipped, or if you're otherwise a Destiny class that isn't Summoner.

I checked the other doors and they remain closed appropriately for me.

How to replicate:
Just don't be a Summoner, be Destiny, or don't have the Contract passive, and walk into the Lispool door.

Assuming I'm not missing anything, this doesn't seem intentional nor should I have any ability to get into that specific door if any other door wouldn't let me in.

I also figured this may have been due to the Shapeshifter update, but it wouldn't make much sense because all you'd need is level 20 Summoner as a class equipped so you can walk in.

[Aqua]

Can confirm this. I managed to walk in with a Ghost/DH. This is present on both the Live server and the test server.

[Neus]

This has been corrected.