I couldn't even get that far, when I tried to open the field app on iOS, it crashed immediately. On Android it would open at least and things seemed to work ok (if I remember correctly), but the survey took a few minutes just to open.
Apparently with version 3.14 of field app, they've implemented updates that "optimize the way that complex calculations are handled" so it is much quicker with large/complex surveys. Like I said, I can't be exactly sure it's related at all to what you're experiencing but wanted to share just in case!
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