BI-146095 fix：文本下拉加载最后一次缓存时cachegroup新增了

packages/fineui/src/widget/multiselect/loader.js

@@ -74,7 +74,7 @@ export class MultiSelectInnerLoader extends Widget {
             this.next.setLoaded();
             const items = this._composeItems(this.cachItems.slice(0, 100));
             this.cachItems = this.cachItems.slice(100);
-            this.addItems(items);
+            this.addItems(items, true);
 
             return;
         }
@@ -183,7 +183,7 @@ export class MultiSelectInnerLoader extends Widget {
         ]);
     }
 
-    addItems(items) {
+    addItems(items, isFromCache = false) {
         this.count += items.length;
         if (isObject(this.next)) {
             if (this.hasNext()) {
@@ -194,7 +194,7 @@ export class MultiSelectInnerLoader extends Widget {
             }
         }
         //  cacheGroup渲染的是全量的,如果这次加载更多add的items是从cacheItems里面拿的,那不用再add了
-        if (this.cachItems.length > 0) {
+        if (isFromCache) {
             this.button_group.addItems(...arguments);
             return;
         }