fix(uts): mutiple class instance

src/platforms/app-plus/service/api/plugin/uts.js

@@ -173,7 +173,9 @@ function initUTSProxyClass(options) {
     let constructorParams = [];
     let staticMethods = {};
     let staticProps = [];
+    let isProxyInterface = false;
     if (isProxyInterfaceOptions(options)) {
+        isProxyInterface = true;
         instanceId = options.instanceId;
     }
     else {
@@ -194,8 +196,8 @@ function initUTSProxyClass(options) {
             }
             const target = {};
             // 初始化实例 ID
-            if (isUndefined(instanceId)) {
-                // 未指定instanceId
+            if (!isProxyInterface) {
+                // 初始化未指定时，每次都要创建instanceId
                 instanceId = initProxyFunction(false, extend({ name: 'constructor', params: constructorParams }, baseOptions), 0).apply(null, params);
             }
             if (!instanceId) {