Kendamil Organic clumpy out of Brezza

We are juat transitioning to powdered formula and I am trying to troubleshoot whats going wrong. I have a brezza pro set at either 3 or 4 putting kendamil into a 4 oz glass dr browns bottle. Every time I try a tester 2oz run I end up with clumps all over the sides of the bottle. I've cleaned all the parts and waited for them to dry. Am I doing something wrong? Is this normal?

Update: tried it in a plastic wide mouth bottle and it did not have the issue. I'm wondering if maybe the water I'm using is causing some kind of a bond when in glass