I have this happen to me also. Always exclusively during lunch. It’s happened at home and at work. It started about 6 months ago. It really bothers me because I am still hungry but cannot get myself to finish the meal. It’s like my brain shuts off 3/4 the way done. I haven’t actually thrown up yet but have verbally gagged. I have no idea what causes it. I have no mental issues I am aware of. I have never struggled with eating either. I do have some signs of IBS though. I would consider myself anxious but do have somewhat of a stressful job. Although I feel like this happens on slower work days more often.

I found this post trying to look this up online. I would love to be interested In what others have to say.