Fixed a crash in MySQL database validation where SELECT @@sql_mode doesn’t return a result (#27180).
Allowed combining contrib.postgres.search.SearchQuery with more than one & or | operators (#27143).
Disabled system check for URL patterns beginning with a ‘/’ when APPEND_SLASH=False (#27238).
Fixed model form default fallback for CheckboxSelectMultiple, MultiWidget, FileInput,SplitDateTimeWidget, SelectDateWidget, and SplitArrayWidget (#27186). Custom widgets affected by this issue should implement value_omitted_from_data().
Fixed a crash in runserver logging during a “Broken pipe” error (#27271).
Fixed a regression where unchanged localized date/time fields were listed as changed in the admin’s model history messages (#27302).