diff --git a/webapp/components/CategoriesSelect/CategoriesSelect.vue b/webapp/components/CategoriesSelect/CategoriesSelect.vue
index 4f7a555a3..91fb7704c 100644
--- a/webapp/components/CategoriesSelect/CategoriesSelect.vue
+++ b/webapp/components/CategoriesSelect/CategoriesSelect.vue
@@ -43,6 +43,14 @@ export default {
       selectedCategoryIds: this.existingCategoryIds,
     }
   },
+  watch: {
+    existingCategoryIds() {
+      if (!this.selectedCategoryIds.length && this.existingCategoryIds.length) {
+        this.selectedCategoryIds = this.existingCategoryIds
+        this.$forceUpdate()
+      }
+    },
+  },
   computed: {
     selectedCount() {
       return this.selectedCategoryIds.length
diff --git a/webapp/components/ContributionForm/ContributionForm.vue b/webapp/components/ContributionForm/ContributionForm.vue
index 8863fbc8a..f740e1f05 100644
--- a/webapp/components/ContributionForm/ContributionForm.vue
+++ b/webapp/components/ContributionForm/ContributionForm.vue
@@ -177,6 +177,15 @@ export default {
     groupName() {
       return this.group && this.group.name
     },
+    groupCategories() {
+      return this.group && this.group.categories
+    },
+  },
+  watch: {
+    groupCategories() {
+      if (!this.formData.categoryIds.length && this.groupCategories)
+        this.formData.categoryIds = this.groupCategories.map((cat) => cat.id)
+    },
   },
   methods: {
     submit() {