diff --git a/src/utils/objects.ts b/src/utils/objects.ts
index 166c31c4c3..f240fe2f7d 100644
--- a/src/utils/objects.ts
+++ b/src/utils/objects.ts
@@ -89,10 +89,9 @@ export function objectHasDiff<O extends {}>(a: O, b: O): boolean {
     if (a === b) return false;
     const aKeys = Object.keys(a);
     const bKeys = Object.keys(b);
-    const possibleChanges = arrayUnion(aKeys, bKeys);
-    // if the amalgamation of both sets of keys has the a different length to the inputs then there must be a change
-    if (possibleChanges.length !== aKeys.length) return true;
+    if (aKeys.length !== bKeys.length) return true;
 
+    const possibleChanges = arrayUnion(aKeys, bKeys);
     return possibleChanges.some(k => a[k] !== b[k]);
 }