Hey!
Within the IEnumerator "ReadOutText", there's n if statement that reads "if(startTime.Equals(0f))" please try commenting out this if statement, but leaving everything inside it intact. It appears to fix the issue, but I'm having trouble thinking about if this should cause any additional issues. Everything appears to work fine when Read() and Append() is called after doing this fix but I'm not 100% certain yet. Thank you so much for catching this!