I think we are always susceptible to it from genetics or what have you but we can deal with it or become accustomed enough that the triggers start not being triggers in the same situations. Kinda like meeting someone new, getting used to them and maybe not stuttering with them like we did when we first had to meet them. Or getting used to talking on the phone for one thing over another. A few years ago I started sales and stuttered HARD on my name again. I realized it was more the introduction than my name cause even if someone interrupted I still stuttered in that moment even if I didn't say my name. Heck when making a call to a client, I stuttered on their totally random name just as bad as I did for my own! This was after not stuttering like that on the phone or with introductions for well over a decade. Pretty much since my college years when I was looking for work. I was confused over it, thought I was long past this but it took another unique fearful situation for the susceptibility I always had since childhood to really kickstart again and the same old worries and confusion and etc came back and I fell into my doubts and thought I was just built this way and would always stutter in these situations and going forward again. Now, I don't. It's not even an after thought. I went through it, did it anyway, continued to do it and now I make calls to clients without a second thought and actually prefer it half the time over texting (cause I drive a lot!). I went from stuttering with sales and clients to them being some of my most comfortable interactions. I got good at it (no jinx) and am very friendly and i went from the fear of putting my hand out not being able to say my name to ALWAYS putting my hand out saying my name without much thought to it and am just fine. I just enjoy smiling and introducing myself. People are nice. So what ever it is, what ever changed and re-ignited it, you don't need to shy away from it. Do it without an afterthought.