Sure, it was a rather simple thing actually. The engine has a feature which automatically parses note tags into an object inside the event called "meta". The SpeechBubble plugin didn't look for the note tag itself, it looks for the tags in this meta object.
The problem was that the way my EventTemplates plugin used to load the template event into memory skipped this automatic parse that creates the meta object, so when the SpeechBubble plugin looked for it in the event which loaded a template it wouldn't find the object and crash. What I did was make sure the templates had the meta object properly set when they are loaded into memory! =)