ArgumentCallback is never executed

[mworzala]

Discussed in #1958

^{Originally posted by Ynverxe November 2, 2023}
I was programming a custom command and after a while I see that the ArgumentCallback is never executed when the argument could not be parsed but rather the default executor of the command is executed. This also happens with the test command published on the wiki. (I tried it)

https://pastebin.com/AqUxr9ms