It is always better if you show screenshot of what are you doing instead of just saying...
1 - Now, that plugin command you mentioned, it is from my Self Variable plugin?
2 - Did you try to use the escape code for self variables in a show text command on a default event to see if it works? That is important because we can compare using it on regular events and the spawned events. If it works on normal events, then probably is a thing with the spawn event plugin.
3 - What spawn event plugin you are using?
