修复聊天模块bug

rong_im/kit/src/main/java/io/rong/imkit/conversationlist/viewmodel/ConversationListViewModel.java

@@ -161,6 +161,7 @@ public class ConversationListViewModel extends AndroidViewModel {
                 RongIMClient.getInstance().getConversationListByPage(new RongIMClient.ResultCallback<List<Conversation>>() {
                     @Override
                     public void onSuccess(List<Conversation> conversations) {
+                        mUiConversationList.clear();
                         if (loadMore) {
                             mRefreshEventLiveData.postValue(new Event.RefreshEvent(RefreshState.LoadFinish));
                         } else {