
This is because after you deselect the "Include time" option, the time value will still be stored in this column.
If the time values in the two columns are different, then deselect the "Include time" option, although the date is the same, the time value still exists and prevents the column formatting from working.
Therefore, we can edit the items, select the same date value as before, in this way, the time value will be removed, and the column formatting will work normally.
If an Answer is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.