diff --git a/src/util.ts b/src/util.ts
index c6d3ddc..6352ffd 100644
--- a/src/util.ts
+++ b/src/util.ts
@@ -1575,7 +1575,7 @@ export const snooLogWrapper = (logger: Logger) => {
  * Cached activities lose type information when deserialized so need to check properties as well to see if the object is the shape of a Submission
  * */
 export const isSubmission = (value: any) => {
-    return value instanceof Submission || (value.id !== undefined && value.id.includes('t3_')) || value.name.includes('t3_');
+    return value instanceof Submission || (value.id !== undefined && value.id.includes('t3_')) || value.domain !== undefined;
 }
 
 export const asSubmission = (value: any): value is Submission => {