diff --git a/packages/core/src/index.ts b/packages/core/src/index.ts
index 8ba00bfb..76fdb2f4 100644
--- a/packages/core/src/index.ts
+++ b/packages/core/src/index.ts
@@ -43,14 +43,14 @@ class MiaoScriptCore {
         console.i18n("ms.core.plugin.initialize")
         this.pluginManager.scan(this.pluginFolder)
         this.pluginManager.build()
-        this.pluginManager.load()
-        this.pluginManager.enable()
+        this.pluginManager.load(this.pluginManager.getPlugins())
+        this.pluginManager.enable(this.pluginManager.getPlugins())
         console.i18n("ms.core.plugin.completed", { time: (new Date().getTime() - loadPluginStartTime) / 1000 })
     }
 
     disable() {
         console.i18n("ms.core.engine.disable")
-        this.pluginManager.disable()
+        this.pluginManager.disable(this.pluginManager.getPlugins())
         this.taskManager.disable()
         //@ts-ignore
         require.disable()
diff --git a/packages/ployfill/src/xml-http-request.ts b/packages/ployfill/src/xml-http-request.ts
index 3c7567d2..fb3d97c7 100644
--- a/packages/ployfill/src/xml-http-request.ts
+++ b/packages/ployfill/src/xml-http-request.ts
@@ -87,6 +87,7 @@ export class XMLHttpRequest {
     private _status: number = 0;
     private _statusText: string = null;
     private _response: any;
+    private _responseText: any;
     private _responseURL: string;
     private _responseHeaders: HttpHeader = {};
 
@@ -115,10 +116,10 @@ export class XMLHttpRequest {
         return this._statusText;
     }
     get response() {
-        return this._response ? JSON.parse(this._response) : this._response;
+        return this._response || this.get();
     }
     get responseText() {
-        return this._response;
+        return this._responseText;
     }
     get responseXML() {
         return this._response;
@@ -181,14 +182,17 @@ export class XMLHttpRequest {
         return future;
     }
     get() {
-        switch (this._responseType) {
-            case "json":
-                return this.response;
-            case "text":
-                return this.responseText;
-            default:
-                throw Error(`Unsupport ResponseType: ${this._responseType} !`)
+        if (this._response === undefined) {
+            switch (this._responseType) {
+                case "json":
+                    return this._response = JSON.parse(this._responseText);
+                case "text":
+                    return this._response = this._responseText;
+                default:
+                    throw Error(`Unsupport ResponseType: ${this._responseType} !`)
+            }
         }
+        return this._response;
     }
     abort() {
         this._connection.disconnect();
@@ -211,11 +215,11 @@ export class XMLHttpRequest {
             this._status = this._connection.getResponseCode();
             this._statusText = this._connection.getResponseMessage();
             if (this._status >= 0 && this._status < 300) {
-                this._response = this.readOutput(this._connection.getInputStream());
+                this._responseText = this.readOutput(this._connection.getInputStream());
             } else if (this._status >= 300 && this._status < 400) {
                 this._responseURL = this.getResponseHeader('Location');
             } else {
-                this._response = this.readOutput(this._connection.getErrorStream());
+                this._responseText = this.readOutput(this._connection.getErrorStream());
             }
             this.setResponseHeaders(this._connection.getHeaderFields());
             this.onloadend && this.onloadend();
diff --git a/packages/plugin/src/manager.ts b/packages/plugin/src/manager.ts
index faa86e28..f4af10aa 100644
--- a/packages/plugin/src/manager.ts
+++ b/packages/plugin/src/manager.ts
@@ -123,7 +123,7 @@ export class PluginManagerImpl implements plugin.PluginManager {
     }
 
     private checkAndGet(name: string | interfaces.Plugin | undefined | any): Map<string, interfaces.Plugin> | interfaces.Plugin[] {
-        if (name == undefined) { return this.pluginInstanceMap }
+        if (name == this.pluginInstanceMap) { return this.pluginInstanceMap }
         if (typeof name == 'string' && this.pluginInstanceMap.has(name)) { return [this.pluginInstanceMap.get(name)] }
         if (name instanceof interfaces.Plugin) { return [name as interfaces.Plugin] }
         if (name.description || name.description.name) { return [name as interfaces.Plugin] }