TD 099 2017.14620
The columns as stated in the title are empty.
Interestingly enough, a folder dat using project.folder as the root folder managed to show the dates after saving the toe.
The folder dat using a relative path /somefolder however, continues to not show dates until I manually re-enter the folder directory .
Thanks for this report, was able to reproduce it
This will be fixed in 2017.16040+