Only time my silent blocks have come back in last 2 years was after getting strep throat and the flu. After a hour of remembering to use my new habits, I got control of blocks and they disappeared again. I say what I want, when I want and how I want to 50-100 people every day. Lots of it is public and sometimes high stress situations. I actually feel like I’m a better (more interesting and easier to understand) speaker now than I was before.