diff --git a/webui/src/web-components/sketch-diff2-view.ts b/webui/src/web-components/sketch-diff2-view.ts
index 78b1da3..f524dd5 100644
--- a/webui/src/web-components/sketch-diff2-view.ts
+++ b/webui/src/web-components/sketch-diff2-view.ts
@@ -546,6 +546,9 @@
       this.fileExpandStates.clear();
     } finally {
       this.loading = false;
+      // Request a re-render.
+      // Empirically, without this line, diffs are visibly slow to load.
+      this.requestUpdate();
     }
   }