Disliking Once Comforting Foods: Is It Just Me?

I have been experiencing that for awhile now both food and drink (water)

I have ARFID and am in a community for it. This seems pretty common, unfortunately. When I'm stressed, it's especially bad. I'm in therapy for it, and one of the things we're working on is my ability to recognize and deal with stress appropriately. It does seem to be helpful.

Taste is a sense and sometimes with autism when you get overstimulated and stressed it can cause you to not be able to handle sensory stuff that you usually can and it definitely effects food, especially when ARFID or other EDs are involved. For me when im stressed all I can handle is fruit/smoothies and plain angle hair pasta because they don't have as much going on sensory wise as my usual foods do.

Yes. I have the thing I call "getting it out of my system". Happens with anything food especialy. With mild ADHD that is not enough present to get diagnosed, but might still make you feel "that doesn't feel like ASD". For example getting fixated on something and in few months "I'm done with it forever now". Or It might be one or two types depression. One type is emotional, caused by something (from what you said it can be stress responce) other is physical, like geting sick without symptoms or eating spoiler food, but it wasn't spoiler enough for food poisoning.

I’ve experienced this my entire life my parents used to get so frustrated because they would bulk buy my favorite foods then all of a sudden i dont like them at all anymore. For example when i was a kid for like a year straight id eat 3 bananas a day i was obsessed with them but one day i took a bite and hated it and havent eaten them since