diff --git a/frontend/src/views/tasks/TaskDetailView.vue b/frontend/src/views/tasks/TaskDetailView.vue
index 9bcc20265..023d33756 100644
--- a/frontend/src/views/tasks/TaskDetailView.vue
+++ b/frontend/src/views/tasks/TaskDetailView.vue
@@ -705,7 +705,7 @@ const color = computed(() => {
 
 const hasAttachments = computed(() => attachmentStore.attachments.length > 0)
 
-const isModal = computed(() => Boolean(backdropView))
+const isModal = computed(() => Boolean(props.backdropView))
 
 function attachmentUpload(file: File, onSuccess?: (url: string) => void) {
 	return uploadFile(props.taskId, file, onSuccess)