chore: Follow up image bubble performance

lib/pages/chat/events/image_bubble.dart

@@ -40,11 +40,15 @@ class ImageBubble extends StatelessWidget {
         event.infoMap['xyz.amorgan.blurhash'] is String
             ? event.infoMap['xyz.amorgan.blurhash']
             : 'LEHV6nWB2yk8pyo0adR*.7kCMdnj';
-    return BlurHash(
+    return SizedBox(
+      width: width,
+      height: height,
+      child: BlurHash(
         blurhash: blurHashString,
         width: width,
         height: height,
         fit: fit,
+      ),
     );
   }