Suppose you're on the Databases tab under instance. The one that shows the database cards. Then someone adds a new database elsewhere so you hit either the refresh button at the top of that page or the refresh button in the sidebar to load the databases again.

The new database card will appear, but there will forever be skeleton loaders for the number of collections and the storage taken up because we don't load that.

See the attached screenshot. I'm on the Databases tab, added a database and collection via mongosh (this could have also been a different user or an external script) and then I hit the refresh button at the top of the page (this could have also been the refresh button in the sidebar) and then the new database appears, but it never loads its storage size, collections and indexes. Those skeleton loaders stay around forever.