That sounds *very* familiar to me, and as far as I'm aware I'm norm-core neurotypical so I think it might just be a humans thing. Sometimes my brain will furiously run over and over whatever it was to the point of exhaustion and I practically pass out. Also, for me the two reactions it's not like the in the moment (thank you for the robust feedback) one is incorrect or false - I authentically hold both responses. (Even aside from the not wanting to cause a fuss, which is also a strong tendency.)
Also - *much sympathy*