Every time I bake a cake mix is makes me and others feel sick and is always sunken?

So I’ve baked multiple mixes and they always make me and other feel sicky in our throats after.

I don’t know what it could be? It’s not out of date ingredients because I buy new eggs and such every time.

I use vegetable oil over butter if that affects it? And bake it in a glass baking tray?

They always taste iffy after and leave a sickly after taste. But I can make cupcakes from scratch and they’re really good.

Am I doing something wrong?