The Legacy and Actual hours fields should now be displaying the same and correctly."The new field isn't supposed to change the information you see, just how we store it. "I assume it will be a retired API call at some point down the road?

Another support update:"I wanted to follow up with you on this case. The reason for the change in fields was to update how the actual hours are stored in the database. For the legacy field, work is stored in minutes in the database, and then converted and displayed in hours when called for by the si...

It seems you will need to make sure you are using the "Legacy Actual Hours" field if you want partial hour times to show. 

Yes, I reached back out and got this "My apologies! You are right on the fields - I misread them on my end and gave the definitions backward. I am checking in with our Product team on this - the only difference in the two that I can see in my documentation is the format of the number."

From Support:"The difference in these fields is the format that the number is stored in. The Legacy field will give the work as a whole number, while the new field allows a decimal amount for greater precision. More information can be found in this article, "