Attempt to change Capture Time mm/dd/yyyy not working

I am using Lightroom Classic CC 8.2 on a Mac running Mojave 10.14.4 and can no longer change the Capture Time  correctly in the Metadata using the "Change Capture Time" function. Specifically, if you try to change the month, date, and year of Capture Time either for a single photo or for a group of photos, the month and day is accepted and changed correctly but you can only input three digits in YYYY field, not the full four digits. Moreover, if you try to enter the forth digit of the year, only that last digit is accepted and the date gets recorded incorrectly on the stored metadata.

For example,  if want to change the Capture Date to "06/15/1998", Lightroom accepts the 06/15 part of the date but will not accept the full 4-digits "1998 - only the first three digits "199". If you try to input the forth digit "8", Lightroom only accepts and stores the last (right-most) digit and the changed date gets erroneously set to 6/15/   8 – see screen shot.

  The metadata on the catalog is also screwed up - see the entries "0003" (should be "2003") and "0097" (should be "1997").

This problem has stopped my scanning project since all the photos I am scanning need to have the Capture Time reset.

Any help to this problem is appreciated.