It is caused by the command and can be replicated easily, it was just that my server was lagging; which is unrelated to the message
And as far as I know it is only the text that is required, the others have a default value
I'll just do it again and execute the command a few more times so one cant say "its not related to the command"
When executing with the console one can see it clearer because it is printed directly between command and summoned message