oneOf rendered as pulldown in API Reference, but Selection Doesn't Update Displayed Schema

In my OAS 3.0 spec, I have a number of oneOf's specified. They render in Readme.com as pulldowns, with the first object defined in the oneOf block selected, and its schema displayed.

When a different selection is made in the pulldown, I would expect that the pulldown updates its value, and the schema for the previous selection is replaced by the schema for the new selection. However, this is not occurring.

What is the expected behavior when a new selection is made in a pulldown? If the pulldown is supposed to update and the schema for the new selection is supposed to replace the old selection's schema in the display, is there an example spec I can review to see what I may be missing in my spec?

Thanks!