Thanks for your feedback.
Before posting, please read how to report bug or request support effectively.
Bug reports without an attached log file are usually useless.
I know this is an old thread but I spent many days on this issue and finally, I am able to narrow down the issue.
Please see attached file that shows the same file with the same INI file but switching between various version between 5.5.6 to 5.13.3 where it shows the Modified Date is blank for all version except for version 5.5.6