I have the exact same problem. I created a form a month ago with some questions that are conditionnal to another field value. But since the new update this week (march 2022), these conditions aren't working on Map Viewer, so we can see ALL fields while we should see just some of them. It's really frustrating as it's really not usefull to see all of them.
Conditionnal visibily works for groups but not for fields. Not sure why.