Newly created orders do not have Modified Date in order list

Newly created orders (Post 2.0.2 migration) do not have a last modified date displayed in the order list (that field is blank). If you click on the orders without a modified date, the date is there in the order and the date appears in the order list. If I click off of the orders screen and come back, the date disappears again until I click it.

See screenshot.