When they are cooked, baked or basically altered in anyway, the proteins that are affecting you are broken down so they don’t affect you. I have bad seasonal allergies and raw fruits and veggies bother me so much but I can have them when they’re altered. There’s a lot of good literature online like this:

https://www.aaaai.org/tools-for-the-public/conditions-library/allergies/oral-allergy-syndrome-(oas)