Zsh Docker Plugin not Working

You might want to try and remove any .zcompdump-(...) files you may have on your user's home directory - using something like rm ~/.zcompdump* on a terminal, or some file browser - and then reload the .zschrc file with the command source ~/.zshrc or restart the terminal - whichever works best for you. See this

Then see if it works.

It seems oh-my-zsh is not loading plugins/docker/_docker file. You must add it to ~/.zshrc in an another way. Add these lines to your ~/.zshrc file:

fpath+=($ZSH/plugins/docker)
autoload -U compinit && compinit