diff --git a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/messages.component.ts b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/messages.component.ts
index 00a6126f..7bbecb02 100644
--- a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/messages.component.ts
+++ b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/messages.component.ts
@@ -9,7 +9,8 @@ import {
   Inject,
   ChangeDetectorRef,
   ChangeDetectionStrategy,
-  ElementRef
+  ElementRef,
+  NgZone
 } from '@angular/core';
 import {
   ucapAnimations,
@@ -248,6 +249,7 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
     private dialogService: DialogService,
     private snackBarService: SnackBarService,
     @Inject(UCAP_NATIVE_SERVICE) private nativeService: NativeService,
+    private ngZone: NgZone,
     private logger: NGXLogger
   ) {
     this.sessionVerInfo = this.sessionStorageService.get<VersionInfo2Response>(
@@ -1080,19 +1082,30 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
                 .saveFile(buffer, value.fileInfo.fileName, mimeType, savePath)
                 .then(result => {
                   if (!!result) {
-                    this.snackBarService.open(
+                    const snackBarRef = this.snackBarService.open(
                       this.translateService.instant(
                         'common.file.results.savedToPath',
                         {
                           path: result
                         }
                       ),
-                      '',
+                      this.translateService.instant('common.file.open'),
                       {
                         duration: 3000,
-                        verticalPosition: 'bottom'
+                        verticalPosition: 'bottom',
+                        horizontalPosition: 'center'
                       }
                     );
+
+                    snackBarRef.onAction().subscribe(() => {
+                      this.ngZone.runOutsideAngular(() => {
+                        this.nativeService
+                          .openTargetItem(result)
+                          .catch(reason => {
+                            this.logger.warn(reason);
+                          });
+                      });
+                    });
                   } else {
                     this.snackBarService.openFromComponent<
                       AlertSnackbarComponent,
diff --git a/projects/ucap-webmessenger-app/src/app/layouts/native/components/top-bar.component.html b/projects/ucap-webmessenger-app/src/app/layouts/native/components/top-bar.component.html
index 3fcf99a9..c72a8dc9 100644
--- a/projects/ucap-webmessenger-app/src/app/layouts/native/components/top-bar.component.html
+++ b/projects/ucap-webmessenger-app/src/app/layouts/native/components/top-bar.component.html
@@ -501,7 +501,7 @@
           </span>
           <span class="version-info-button">
             <button
-
+              *ngIf="checkingUpdateIsExist"
               mat-flat-button
               class="mat-primary"
               (click)="onClickApplyUpdate($event)"
diff --git a/projects/ucap-webmessenger-app/src/assets/i18n/en.json b/projects/ucap-webmessenger-app/src/assets/i18n/en.json
index 619e2899..b75a81f2 100644
--- a/projects/ucap-webmessenger-app/src/assets/i18n/en.json
+++ b/projects/ucap-webmessenger-app/src/assets/i18n/en.json
@@ -402,6 +402,7 @@
       "save": "Save",
       "saveAs": "Save as",
       "saveAll": "Save all",
+      "open": "Open",
       "downloadSelected": "Download selected",
       "openDownloadFolder": "Open download folder",
       "selectFiles": "Select files",
diff --git a/projects/ucap-webmessenger-app/src/assets/i18n/ko.json b/projects/ucap-webmessenger-app/src/assets/i18n/ko.json
index f2c35bfb..7a6a87a7 100644
--- a/projects/ucap-webmessenger-app/src/assets/i18n/ko.json
+++ b/projects/ucap-webmessenger-app/src/assets/i18n/ko.json
@@ -402,6 +402,7 @@
       "save": "저장",
       "saveAs": "다른 이름으로 저장",
       "saveAll": "파일 모두 저장",
+      "open": "열기",
       "downloadSelected": "선택된 파일 다운로드",
       "openDownloadFolder": "다운로드 폴더 열기",
       "selectFiles": "파일을 선택하세요",
diff --git a/projects/ucap-webmessenger-ui-chat/src/lib/components/messages.component.html b/projects/ucap-webmessenger-ui-chat/src/lib/components/messages.component.html
index 3a546c03..716ee27e 100644
--- a/projects/ucap-webmessenger-ui-chat/src/lib/components/messages.component.html
+++ b/projects/ucap-webmessenger-ui-chat/src/lib/components/messages.component.html
@@ -14,7 +14,7 @@
 >
   <div #chatMessagesContainer class="chat-messages">
     <div
-      *ngIf="eventRemained && !!eventList && eventList.length > 0"
+      *ngIf="initalized && eventRemained && !!eventList && eventList.length > 0"
       class="message-row view-previous"
     >
       <button mat-button (click)="onClickMore($event)" class="bg-accent-dark">
diff --git a/projects/ucap-webmessenger-ui-chat/src/lib/components/messages.component.ts b/projects/ucap-webmessenger-ui-chat/src/lib/components/messages.component.ts
index 6db51a32..f48c3fda 100644
--- a/projects/ucap-webmessenger-ui-chat/src/lib/components/messages.component.ts
+++ b/projects/ucap-webmessenger-ui-chat/src/lib/components/messages.component.ts
@@ -155,6 +155,7 @@ export class MessagesComponent implements OnInit, OnDestroy {
   existReadToHereEvent = true;
   hidden = false;
   swapped = false;
+  initalized = false;
 
   constructor(
     private logger: NGXLogger,
@@ -171,6 +172,7 @@ export class MessagesComponent implements OnInit, OnDestroy {
     });
     this.roomInfoSubscription = this.roomInfo$.subscribe(roomInfo => {
       this.roomInfo = roomInfo;
+      this.initalized = false;
 
       /** [S] initializing by changed room */
       // reset :: roomLastEventSeq
@@ -532,7 +534,9 @@ export class MessagesComponent implements OnInit, OnDestroy {
         this.swapScrollTo(
           this.eventList[this.eventList.length - 1],
           () => {},
-          () => {},
+          () => {
+            this.initalized = true;
+          },
           -1 === this.virtualScroller.viewPortInfo.endIndex ||
             !isInViewPortItems,
           !isInViewPortItems