When someone messages me with /tell: http://prntscr.com/fhe7zp

When I message someone with /tell: http://prntscr.com/fhe86c

Also nicknames and such don't work, so I guess it uses vanilla /tell.

@SupaHam Hey, are you able to look into this issue perhaps?

Sorry, I'm a quite busy these days. I hope to get back to these issues soon.

Appreciated.

Inform us if its fixed please, everyone is using it for know vanished staff

Disable the minecraft permission to use /tell which should be minecraft.command.tell.

SpigotMC, if not Mojang, has made a breaking change with command aliases. So you'll find /msg works as expected, but /tell is an alias of /msg so it is a lower priority and so Minecraft is allowed to override it. Still thinking of a fix for the problem.

I removed the permission, but still hoping it can be fixed somehow as it seems nearly everyone is used to using /tell.

After much work, I have discovered the change that causes this behaviour.

SpigotMC proceeded to remove some deprecated parts of the Bukkit API. One of those things was Bukkit's built-in equivalent of vanilla commands. Without going into much detail (although commits are below) The pre 1.12 code would make plugin commands a priority over vanilla commands. However, after the removal of this API, and some logic code Minecraft commands are prioritised, but not minecraft command aliases (e.g. /w, /msg, etc.)

I've informed the SpigotMC team via IRC of this issue and wait to hear back regarding a fix. Until then, there is not much I can do to solve this issue in a proper manner. I don't believe this was their intention and hope for the same results you do. :)

The API commit removing VanillaCommand class: link

The CB commit removing usage of VanillaCommand class: link

Fixed as of the latest spigot commit. Nice!