diff --git a/assess2/vue-src/src/basicstore.js b/assess2/vue-src/src/basicstore.js
index 34db500c32..53a2f0c22a 100644
--- a/assess2/vue-src/src/basicstore.js
+++ b/assess2/vue-src/src/basicstore.js
@@ -13,6 +13,7 @@ export const store = reactive({
   inTransit: false,
   autoSaving: false,
   errorMsg: null,
+  blankOverride: false,
   confirmObj: null,
   lastLoaded: [],
   inProgress: false,
@@ -239,6 +240,8 @@ export const actions = {
         }
         response = this.processSettings(response);
         this.copySettings(response);
+        // reset blankOverride when a new question is loaded
+        store.blankOverride = false;
       })
       .fail((xhr, textStatus, errorThrown) => {
         this.handleError(textStatus === 'parsererror' ? 'parseerror' : 'noserver');
@@ -401,11 +404,47 @@ export const actions = {
         changedWork = true;
       }
     }
+    // reset override when all parts are now answered
+    for (const key of Object.keys(changedQuestions)) {
+      const qn = parseInt(key);
+      const question = store.assessInfo.questions[qn];
+      const totalParts = question.answeights ? question.answeights.length : question.parts.length;
+      const answeredParts = changedQuestions[qn].length;
+      if (answeredParts === totalParts) {
+        store.blankOverride = false;
+        store.errorMsg = null;
+        break;
+      }
+    }
+    // blank-parts warning (only once): if some but not all parts are answered
+    for (const key of Object.keys(changedQuestions)) {
+      const qn = parseInt(key);
+      const question = store.assessInfo.questions[qn];
+      const totalParts = question.answeights ? question.answeights.length : question.parts.length;
+      const answeredParts = changedQuestions[qn].length;
+      if (answeredParts > 0 && answeredParts < totalParts) {
+        // first warning: block and set override
+        if (!store.blankOverride) {
+          store.errorMsg = 'blankparts';
+          store.inTransit = false;
+          store.blankOverride = true;
+          return;
+        }
+        // override present: clear the warning and allow submission through
+        store.errorMsg = null;
+        store.inTransit = false;
+        break;
+      }
+    }
     if (Object.keys(changedQuestions).length === 0 && !changedWork && !endattempt) {
       store.errorMsg = 'nochange';
       store.inTransit = false;
       return;
     }
+    // Do not clear blankOverride here; only clear it after successful submission
+
+    // Clone changedQuestions before AJAX for later blankOverride logic
+    const submittedChangedQuestions = { ...changedQuestions };
 
     window.MQeditor.resetEditor();
     window.imathasAssess.clearTips();
@@ -510,6 +549,21 @@ export const actions = {
           return;
         } else {
           store.errorMsg = null;
+          // only reset override if submission was not partial
+          let wasPartial = false;
+          for (const key in submittedChangedQuestions) {
+            const qn = parseInt(key);
+            const question = store.assessInfo.questions[qn];
+            const totalParts = question.answeights ? question.answeights.length : question.parts.length;
+            const answeredParts = submittedChangedQuestions[qn].length;
+            if (answeredParts > 0 && answeredParts < totalParts) {
+              wasPartial = true;
+              break;
+            }
+          }
+          if (!wasPartial) {
+            store.blankOverride = false;
+          }
         }
         if (response.saved_autosaves) {
           this.markAutosavesDone();
diff --git a/assess2/vue-src/src/components/ErrorDialog.vue b/assess2/vue-src/src/components/ErrorDialog.vue
index b5e019e61a..dd2ddc8862 100644
--- a/assess2/vue-src/src/components/ErrorDialog.vue
+++ b/assess2/vue-src/src/components/ErrorDialog.vue
@@ -53,6 +53,10 @@ export default {
       return (typeof this.errormsg === 'string');
     },
     errorTitle () {
+      // show a "Warning" title for blankparts
+      if (this.errormsg === 'blankparts') {
+        return this.$t('Warning');
+      }
       return this.isError ? this.$t('error.error') : this.errormsg.title;
     },
     errorMsg () {
diff --git a/assess2/vue-src/src/locales/en.json b/assess2/vue-src/src/locales/en.json
index 73f49a68ab..9313c6f8ab 100644
--- a/assess2/vue-src/src/locales/en.json
+++ b/assess2/vue-src/src/locales/en.json
@@ -166,6 +166,7 @@
   },
   "error": {
     "error": "Error",
+    "warning": "Warning",
     "invalid_password": "The password you entered was invalid",
     "invalid_aid": "Invalid assessment ID",
     "no_access": "You must be a student, teacher, or tutor to access this assessment",
@@ -187,6 +188,7 @@
     "lti_no_session": "Your session expired. Please go back to your LMS and open the assignment again.",
     "fast_regen": "Hey, how about slowing down and trying the problem before hitting Get a Similar Question?  Wait 5 seconds before trying again.",
     "nochange": "Your answers have not changed since your last submission.",
+    "blankparts": "Some parts are unanswered; submitting again will bypass this warning.",
     "noserver": "The site is not responding",
     "parseerror": "Server sent an invalid response",
     "livepoll_wrongquestion": "Submitted question is not the current question.",