I have seen this behavior before, I know it was a bug that I thought they produced a hot-fix for, but I've still experienced it intermittently. It usually works for me after a few more attempts of clicking "Update Survey"....
(I'm on version 3.14.256)
Best,
Katie
“The goal is not simply to ‘work hard, play hard.’ The goal is to make our work and our play indistinguishable.”
- Simon Sinek