apps/admin/src/pages/Users/index.tsx

@@ -251,7 +251,18 @@ const UsersPage: React.FC = () => {
             disabled={r.isArchived}
             onSave={(next) => saveCell(r, USER_FIELDS.username, next)}
           >
-            {v}
+            <span
+              title={v}
+              style={{
+                display: 'block',
+                maxWidth: '100%',
+                overflow: 'hidden',
+                textOverflow: 'ellipsis',
+                whiteSpace: 'nowrap',
+              }}
+            >
+              {v}
+            </span>
           </EditableCell>
         ),
       },