When you use Sorting in lists on NotionApps, it will sort the empty data in properties after the non-empty data. This is now in line with how Notion itself sorts data.
For example, if you have 4 items with dates: Date1, Date2, Date3 and the last one has no date (let’s call it null). You sort them with A-Z (ascending sort).
Old behaviour
null
Date1
Date2
Date3
New behaviour
Date1
Date2
Date3
null