diff -r 8c757af2fc50 -r 1485db1e2b5e src/pyams_content/features/search/portlet/__init__.py
--- a/src/pyams_content/features/search/portlet/__init__.py	Wed Jun 24 12:07:40 2020 +0200
+++ b/src/pyams_content/features/search/portlet/__init__.py	Fri Jun 26 12:54:13 2020 +0200
@@ -42,7 +42,9 @@
     @staticmethod
     def has_user_query(request):
         params = request.params
-        return params.get('user_search', '').strip() or params.get('tag', '').strip()
+        return params.get('user_search', '').strip() or \
+            params.get('tag', '').strip() or \
+            params.get('collection', '').strip()
 
     @staticmethod
     def _get_items(request=None, start=0, length=10, limit=None, ignore_cache=False):