Sync group view mode and main table

CHANGELOG.md

@@ -59,6 +59,7 @@ Note that this project **does not** adhere to [Semantic Versioning](http://semve
 - We fixed a bug where switching between themes will cause an error/exception. [#8939](https://github.com/JabRef/jabref/pull/8939)
 - We fixed a bug where files that were deleted in the source bibtex file were kept in the index. [#8962](https://github.com/JabRef/jabref/pull/8962)
 - We fixed "Error while sending to JabRef" when the browser extension interacts with JabRef. [JabRef-Browser-Extension#479](https://github.com/JabRef/JabRef-Browser-Extension/issues/479)
+- We fixed a bug where updating group view mode (intersection or union) requires re-selecting groups to take effect. [#6998](https://github.com/JabRef/jabref/issues/6998)
 - We fixed a bug that prevented external group metadata changes from being merged. [#8873](https://github.com/JabRef/jabref/issues/8873)
 
 ### Removed

src/main/java/org/jabref/gui/maintable/MainTableDataModel.java

@@ -47,7 +47,10 @@ public MainTableDataModel(BibDatabaseContext context, PreferencesService prefere
 
         entriesFiltered = new FilteredList<>(entriesViewModel);
         entriesFiltered.predicateProperty().bind(
-                EasyBind.combine(stateManager.activeGroupProperty(), stateManager.activeSearchQueryProperty(), (groups, query) -> entry -> isMatched(groups, query, entry))
+                EasyBind.combine(stateManager.activeGroupProperty(),
+                        stateManager.activeSearchQueryProperty(),
+                        groupsPreferences.groupViewModeProperty(),
+                        (groups, query, groupViewMode) -> entry -> isMatched(groups, query, entry))
         );
 
         IntegerProperty resultSize = new SimpleIntegerProperty();