Yes, tea will sometimes really set my stomach on fire. Just about any tea will do it but if I drink Sleepytime before bed I will suffer. I really like it but it will do a number on my stomach.
Tea is actually hard on your stomach. If you have acid reflux, etc. tea can really aggravate it. I have acid reflux and tea will sometimes really get my heartburn going.
Seems to be mostly when I drink hot tea.