Turbotax bug: cannot enter qualified dividends which failed to meet holding requirements

The following TurboTax bug is preventing me from filing my tax return:

When filling out the 1099-DIV section, I selected the option "Some qualified dividends are from securities that didn't meet the required holding period."  When I attempt to fill in the "Dividends that meet the 60/90 day holding period" field, my value isn't saved.  Instead the field remains blank, and the 1099-DIV form remains stuck in "Needs review" status.

 

Attempting to fill out the field from my completecheck to-do list has the same results: no matter how many times I enter data, the field remains blank and the 1099-DIV form remains in the todo list.

I tried reporting this through TurboTax Assistant, but it repeatedly told me there was a problem with the phone system.