I have pro sites running with a free level and two upgrade levels. When I test the site as a user and sign up for a free site and click on the upgrade account button the price table shows up without the prices at the top. (mainsite.com/plans/?bid=13)
When I select Annually as the billing period the prices appear and when I then select monthly the prices change as they should. But on page reload the prices disappear again.
The price table on the signup page works without a problem.