Chipotle Mexican Grill

So I generally love Chipotle. But the last time I ate here, my tummy had some issues the next day. This is the second time at a Chipotle (first time was at the one at Stonestown mall in Daly City). Unsure what's going on - if it's something they've started adding, that my body doesn't like, or if it's just some quality control issues. Anyways, I'll probably give it a shot again, cos I guess I like experimenting with my tummy. The location is like a pretty normal Chipotle, BTW. Good bit of space inside, well lit, long lines during lunch hours, and almost no line during dinner hours.