diff --git a/addons/web/static/src/js/views/list/list_model.js b/addons/web/static/src/js/views/list/list_model.js
index 41178498c96..6c592bd977e 100644
--- a/addons/web/static/src/js/views/list/list_model.js
+++ b/addons/web/static/src/js/views/list/list_model.js
@@ -94,14 +94,7 @@ odoo.define('web.ListModel', function (require) {
             options = options || {};
             options.fetchRecordsWithGroups = true;
             return this._super(list, options).then(function (result) {
-                var prom;
-                if (!list.parentID) {
-                    // groupbys buttons are only displayed on the first level of
-                    // groupby so no need to fetch the extra fields for inner
-                    // groups
-                    prom = self._readGroupExtraFields(list);
-                }
-                return Promise.resolve(prom).then(_.constant(result));
+                return self._readGroupExtraFields(list).then(_.constant(result));
             });
         },
         /**
diff --git a/addons/web/static/src/js/views/list/list_renderer.js b/addons/web/static/src/js/views/list/list_renderer.js
index 364c663d117..658319fc2e7 100644
--- a/addons/web/static/src/js/views/list/list_renderer.js
+++ b/addons/web/static/src/js/views/list/list_renderer.js
@@ -579,7 +579,7 @@ var ListRenderer = BasicRenderer.extend({
             var $pager = this._renderGroupPager(group);
             $lastCell.addClass('o_group_pager').append($pager);
         }
-        if (groupLevel === 0 && group.isOpen && this.groupbys[groupBy]) {
+        if (group.isOpen && this.groupbys[groupBy]) {
             var $buttons = this._renderGroupButtons(group, this.groupbys[groupBy]);
             if ($buttons.length) {
                 var $buttonSection = $('<div>', {
diff --git a/addons/web/static/tests/views/list_tests.js b/addons/web/static/tests/views/list_tests.js
index 2c7ce0bacec..aed485aad66 100644
--- a/addons/web/static/tests/views/list_tests.js
+++ b/addons/web/static/tests/views/list_tests.js
@@ -2039,8 +2039,8 @@ QUnit.module('Views', {
 
         await testUtils.dom.click(list.$('tbody:eq(1) .o_group_header:eq(0)'));
 
-        assert.containsNone(list, '.o_group_header button',
-            "there should be no button in the header");
+        assert.containsOnce(list, '.o_group_header button',
+            "there should be one button in the header");
 
         list.destroy();
     });
diff --git a/doc/reference/views.rst b/doc/reference/views.rst
index 56dca21bf1d..b3504add3c1 100644
--- a/doc/reference/views.rst
+++ b/doc/reference/views.rst
@@ -345,7 +345,7 @@ Possible children elements of the list view are:
 
   ``name``
       the name of a many2one field (on the current model). Custom header will be
-      displayed when grouping the view on this field name (only for first level).
+      displayed when grouping the view on this field name.
 
   .. code-block:: xml