diff --git a/src/admin/pages/lists/activities-page.vue b/src/admin/pages/lists/activities-page.vue
index 82aae2ccc..a0d2212fa 100644
--- a/src/admin/pages/lists/activities-page.vue
+++ b/src/admin/pages/lists/activities-page.vue
@@ -89,8 +89,9 @@
                                     :open-on-focus="openOnFocus"
                                     @typing="fetchUsersForFiltering"
                                     @select="filterActivitiesByUser"
+                                    :loading="isFetchingUsers"
                                     field="name"
-                                    icon="magnify">
+                                    icon="account">
                                 <template slot-scope="props">
                                     <div class="media">
                                         <div
@@ -445,7 +446,7 @@
                     moment(dateString[1], this.dateFormat).toDate()
                 ];
             },
-            fetchUsersForFiltering(search) {
+            fetchUsersForFiltering: _.debounce(function (search) {
                 this.isFetchingUsers = true;
 
                 this.fetchUsers({ search: search })
@@ -457,7 +458,7 @@
                         this.$console.error(error);
                         this.isFetchingPages = false;
                     });
-            }
+            }, 500)
         },
         computed: {
             activities(){
diff --git a/src/js/store/modules/activity/actions.js b/src/js/store/modules/activity/actions.js
index 838b93039..fbd3d33df 100644
--- a/src/js/store/modules/activity/actions.js
+++ b/src/js/store/modules/activity/actions.js
@@ -21,8 +21,18 @@ export const fetchActivities = ({ commit }, { page, activitiesPerPage, search, s
         endpoint += '&' + qs.stringify(dateQuery);
     }
 
-    if (authorId != undefined && authorId != null)
-        endpoint += `&authorid=${authorId}`;
+    if (authorId != undefined && authorId != null) {
+        let metaQuery = {
+            metaquery: [
+                {
+                    value: authorId,
+                    key: 'user_id',
+                    compare: '='
+                }
+            ]
+        };
+        endpoint += '&' + qs.stringify(metaQuery);
+    }
 
     return new Promise((resolve, reject) => {
         axios.tainacan.get(endpoint)
@@ -60,8 +70,18 @@ export const fetchCollectionActivities = ({ commit }, { page, activitiesPerPage,
         endpoint += '&' + qs.stringify(dateQuery);
     }
 
-    if (authorId != undefined && authorId != null)
-        endpoint += `&authorid=${authorId}`;
+    if (authorId != undefined && authorId != null) {
+        let metaQuery = {
+            metaquery: [
+                {
+                    value: authorId,
+                    key: 'user_id',
+                    compare: '='
+                }
+            ]
+        };
+        endpoint += '&' + qs.stringify(metaQuery);
+    }
 
     return new Promise((resolve, reject) => {
         axios.tainacan.get(endpoint)
@@ -86,8 +106,18 @@ export const fetchItemActivities = ({ commit }, { page, activitiesPerPage, itemI
     if (search != undefined && search != '')
         endpoint += `&search=${search}`;
 
-    if (authorId != undefined && authorId != null)
-        endpoint += `&authorid=${authorId}`;
+    if (authorId != undefined && authorId != null) {
+        let metaQuery = {
+            metaquery: [
+                {
+                    value: authorId,
+                    key: 'user_id',
+                    compare: '='
+                }
+            ]
+        };
+        endpoint += '&' + qs.stringify(metaQuery);
+    }
 
     if (searchDates && searchDates[0] != null && searchDates[1] != null) {
         let dateQuery = {