Blocks with custom spans in content-body region break in tablet

[meganem]

If you place blocks in the content-body region with span3 on them for example (to create a three col grid), in tablet they do not get the applied margin-right styles, as found in line 212 of base.scss.

We guess that this is because the content-body region is reserved only for the body field, and blocks should be placed in other regions. BUT should we be supporting this in the content-body region?

Recently came up in Cardinal at Work phase 2 site on subsite landing pages:
https://sites.stanford.edu/caw/benefits-rewards