bug fix

src/modules/base/components/ModifyStudentSimple.vue

@@ -203,7 +203,7 @@ export default {
 
       this.$message.success("添加成功！");
       this.$emit("modified");
-      this.modalForm = { ...initModalForm };
+      this.modalForm = this.$objAssign(initModalForm, this.instance);
     },
     async submitSelect() {
       if (!this.selectedStudentIds.length) {