I tested on the latest with a format of DD.MM.YYYY and all works well. This should be working as of 8.1.10.
Please refer to the MomentJS docs for the proper formatting options:
https://momentjscom.readthedocs.io/en/latest/moment/04-displaying/01-format/
In looking at the docs I am seeing dd as the short hand value of the day of the week: Mo, Tu etc and mm is actually the minutes.
Hope this helps!