Occasionally, an Object Manager grid renders date information as the default result rather than a properly localized string.
This issue occurs as a result of some interactions that lead to strings for data marked as a 'date' type, which are upgraded to Date objects.
For example, a date value like Feb 12, 2020, is displayed as a datetime value like Feb 12, 2020 00:00:00 GMT-500 (Eastern Standard Time).
There is no workaround for this issue.