Content is displaying page-wide even though right-hand nav is present

https://docs.couchbase.com/server/5.5/install/upgrade-strategy-for-features.html

^This page has an unusually large table that is rendering as page-wide, when it should be rendering narrower because the right-hand nav is present. This issue is not present in a later version of the page which removes some columns: https://docs.couchbase.com/server/6.0/install/upgrade-strategy-for-features.html