diff --git a/app/assets/javascripts/views/challenge_modal/challenge_modal.tsx b/app/assets/javascripts/views/challenge_modal/challenge_modal.tsx
index 6530d7d71..105ca989c 100644
--- a/app/assets/javascripts/views/challenge_modal/challenge_modal.tsx
+++ b/app/assets/javascripts/views/challenge_modal/challenge_modal.tsx
@@ -178,7 +178,7 @@ class ChallengeModalCtrl extends PureViewCtrl<unknown, ChallengeModalState> {
     if (!this.validate()) {
       return;
     }
-    if (this.submitting) {
+    if (this.submitting || this.state.processing) {
       return;
     }
     this.submitting = true;