sidebar overlaps header when navigating within a page

[afeld]

What did you do?

1. Skip filling out Information about you (so there are a bunch of errors)
2. Click Review for that section
3. Click on one of the questions.

What did you expect to see?

The sidebar hidden behind the heading.

What did you see instead?

The sidebar overlaps the heading.

Additional Information

Originally reported in #482 (comment), but happening on the develop branch. @ryanhofdotgov Mind also confirming you're seeing this on develop?

/cc #502