I hope to overcome this issue. The problem is that I am a semi-stuttering person, and I speak normally most of the time. I am a very social and cheerful person, but this happens in front of students I have known for years. They thought the issue was resolved, and I actually want to improve our relationship after what happened years ago. However, something discouraging like this happened today, which feels like a slap in the face, and I don't know how to handle this block.