If we breakdown conversion by day, week, etc., no values show in workspace. We can copy the cells and paste them and see the values, but we can't see them in workspace. It's the only metric, so far, that has this issue.
I've been having this problem as well the last little bit. At one point I had an hour breakdown, and one of the hours had 0 visits, but I broke it down by minute and saw all the visits for minute.
I've found that it tends to happen if I have a workspace open for a while. Closing and refreshing sometimes works, sometimes I have to make a new table for it to work.