Schedule.GetCalculatedValues bug?

I am trying to use Schedule.GetCalculatedValues by SteamNodes, however it does not appear to be working at all times. It’s only pulling the values from half of our schedules. I made a very simple test and as you can see, it is pulling the header but not the values. If I do the same with a similar schedule, it works as expected. If I check ‘use levels’ then uncheck it, it works as expected. Any idea what I am doing wrong here?