Thank you for the reply. We did not make explicit changes on our end, but the "billable" is now checked by default and working as expected. 

We did not clear our browser cache, though it may have occurred coincidentally and automatically by the browser itself.  Unlikely though..

We will keep this fix in mind if the problem arises again. If clearing the cache does not solve the problem in the future, we will contact technical support for a screen share session to review the issue.