Josek5494 just created a blank project to test your plugin again. Same result as with my actual project, none of the plugin actions do anything. My event sheet looks like this:
http://imgur.com/01CiAbf
http://imgur.com/qGl0WYD
My layout looks like this:
http://imgur.com/3hb05Iz
After exporting to iOS, I'm noticing something strange. When I tap any of the 3 buttons, the first 'Set text' action resolves and changes the text to "Logging in", but the second 'append text' action does not resolve. Not sure why this is but it seems like the action from your plugin is stopping any subsequent actions from resolving... When I test the same thing on my browser via Construct 2 (localhost) the text changes to "Logging in - Still logging in", that is, both the 'set text' and 'append text' actions resolve. Any idea what this could mean?