Conflict with Gravity Forms

I have been using both Gravity Forms & “Countdown Timer – Widget Countdown” for many years. I am not sure what change introduced the conflict, but I am no longer able to edit date fields on submitted Gravity Form entries while “Countdown Timer – Widget Countdown” is active. When I open the entry edit view, I can change other field values, but I only see the date field labels, no field with the actual submitted date.

I reproduced this issue with a default theme.