I noticed that there is the possibility to choose time with :00 and :30 minutes.
There is also a manual entry box where I can write a different date/time but it seems that it doesn’t save the manual input.
Here’s a short screen capture Storage Share
to better explain.
The issue affects the four format types in different ways. As per my quick tests, the ISO and American format are not affected at all. The German/Russian date format is affected the most.
ISO or American format: the observed behavior is the desired behavior.
European format: some manually entered minute values are saved, some are not; no obvious pattern
German/Russian: no manually entered minute value is saved