https://www.drupal.org/project/smart_date/issues/3163066
"Reduce output duplication" removes period from German dates [#3163066] | Drupal.org
Aug 28, 2020 - Problem/Motivation When "Reduce output duplication" is used with German date format, an essential character (period) is removed on date ranges within one...
from germanreduceoutputduplicationremoves