I came across a problem while developing and posted about it in the forums. No one seemed to have an answer and then I was advised to post a bug report as a member tried it and it seemed to not work for him either. Here is the post:

https://www.spigotmc.org/threads/servercommandevent-problem-not-blocking-commands-from-other-plugins.326181/#post-3052499

When the ServerCommandEvent fires it only fires when the user puts the command into the console directly but it does not fire when a different plugin uses the Bukkit.dispatchCommand(
Bukkit.getConsoleSender()