diff --git a/ui/src/components/workflow/designer/forms/BranchBlockNodeConfigExprInputBox.tsx b/ui/src/components/workflow/designer/forms/BranchBlockNodeConfigExprInputBox.tsx
index ce4fdb68..693de709 100644
--- a/ui/src/components/workflow/designer/forms/BranchBlockNodeConfigExprInputBox.tsx
+++ b/ui/src/components/workflow/designer/forms/BranchBlockNodeConfigExprInputBox.tsx
@@ -249,6 +249,9 @@ const BranchBlockNodeConfigExprInputBox = forwardRef<BranchBlockNodeConfigExprIn
     };
 
     const handleFormChange = (_: unknown, values: ConditionFormValues) => {
+      // TODO: 这里直接用参数 `values` 会丢失部分字段，引发 Issue #1096。
+      // 暂时先用 `getFieldsValue()` 代替，待排查原因，疑似与 antd v6 升级有关。
+      values = formInst.getFieldsValue();
       setValue(formValuesToExpr(values));
     };
 
diff --git a/ui/src/components/workflow/designer/nodes/_shared.tsx b/ui/src/components/workflow/designer/nodes/_shared.tsx
index 617e38da..708e9a8a 100644
--- a/ui/src/components/workflow/designer/nodes/_shared.tsx
+++ b/ui/src/components/workflow/designer/nodes/_shared.tsx
@@ -210,6 +210,11 @@ const InternalNodeMenuButton = ({
 
   return playground.config.readonlyOrDisabled ? null : (
     <Dropdown
+      styles={{
+        root: {
+          zIndex: 10 /* 确保要比 Minimap 组件层级要高，防止被遮挡而点击不到 */,
+        },
+      }}
       arrow={false}
       destroyOnHidden
       menu={{
@@ -243,9 +248,6 @@ const InternalNodeMenuButton = ({
           e.domEvent.stopPropagation();
         },
       }}
-      overlayStyle={{
-        zIndex: 10 /* 确保要比 Minimap 组件层级要高，防止被遮挡而点击不到 */,
-      }}
       trigger={["click"]}
     >
       <Button