Hardcore not working

[mrdrew]

this worked for me.

Gamemode and others not "sticking"

Are you restarting the server after making the changes in the webui? One thing to note is that the webui only changes the on-disk files, e.g., server.properties. Minecraft, on the other hand, only reads these files on server launch. Restarting the server should make these changes take effect. I believe it’s possible to also instead change these attributes immediately without reboot by sending them to the console, which will also update the on-disk files, but restarting should pretty much 100…