--- a/client/src/components/usermanagement/Usermanagement.vue	Mon Mar 04 16:20:57 2019 +0100
+++ b/client/src/components/usermanagement/Usermanagement.vue	Mon Mar 04 16:28:49 2019 +0100
@@ -171,13 +171,20 @@
     ...mapState("application", ["showSidebar"]),
     sortedUsers() {
       const start = (this.currentPage - 1) * this.pageSize;
-      return this.users.slice(start, start + this.pageSize).sort((a, b) => {
-        if (a[this.sortColumn].toLowerCase() < b[this.sortColumn].toLowerCase())
-          return this.sortDirection === "ASC" ? -1 : 1;
-        if (a[this.sortColumn].toLowerCase() > b[this.sortColumn].toLowerCase())
-          return this.sortDirection === "ASC" ? 1 : -1;
-        return 0;
-      });
+      return this.users
+        .filter(u => u) // to clone the array and leave the original store value intact
+        .sort((a, b) => {
+          if (
+            a[this.sortColumn].toLowerCase() < b[this.sortColumn].toLowerCase()
+          )
+            return this.sortDirection === "ASC" ? -1 : 1;
+          if (
+            a[this.sortColumn].toLowerCase() > b[this.sortColumn].toLowerCase()
+          )
+            return this.sortDirection === "ASC" ? 1 : -1;
+          return 0;
+        })
+        .slice(start, start + this.pageSize);
     },
     pages() {
       return Math.ceil(this.users.length / this.pageSize);