diff --git a/Riot/Modules/Room/RoomViewController.m b/Riot/Modules/Room/RoomViewController.m
index a67358be6..c44e0d95b 100644
--- a/Riot/Modules/Room/RoomViewController.m
+++ b/Riot/Modules/Room/RoomViewController.m
@@ -8402,44 +8402,48 @@ static CGSize kThreadListBarButtonItemImageSize;
         // Show sheet only when opening room
         if (!self.wasFederationDecisionSheetShownBefore)
         {
-            // Do not show sheet if room DM
-            if (!self.roomDataSource.room.isDirect)
+            // #5781 Do not show sheet in case of preview
+            if (!self.isRoomPreview)
             {
-                // Do not show sheet if room is personal notes room
-                if (!self.roomDataSource.room.isPersonalNotesRoom)
+                // Do not show sheet if room DM
+                if (!self.roomDataSource.room.isDirect)
                 {
-                    // Do not show sheet if isFederated room flag is false (default == true)
-                    [self.roomDataSource.room getFederatedFlagWithCompletion:^(BOOL isFederated) {
-                        if (isFederated)
-                        {
-                            // Do not show sheet if users power level is lower than admin
-                            MXRoomPowerLevels *powerLevels = self.roomDataSource.roomState.powerLevels;
-                            if ([powerLevels powerLevelOfUserWithUserID:self.mainSession.myUser.userId] >= RoomPowerLevelAdmin)
+                    // Do not show sheet if room is personal notes room
+                    if (!self.roomDataSource.room.isPersonalNotesRoom)
+                    {
+                        // Do not show sheet if isFederated room flag is false (default == true)
+                        [self.roomDataSource.room getFederatedFlagWithCompletion:^(BOOL isFederated) {
+                            if (isFederated)
                             {
-                                // Show sheet if no serverACL have been configured
-                                [self.roomDataSource.room getCurrentRoomServerACLSettingsWithCompletion:^(NSString *serverACL)
-                                 {
-                                    if (serverACL == nil) {
-                                        self.wasFederationDecisionSheetShownBefore = true;
-                                        RoomFederationDecisionSheet *federationDecisionView = [[RoomFederationDecisionSheet alloc] init];
-                                        UIImage *roomAvatarImage;
-                                        MXKImageView *roomAvatarImageView = ((RoomTitleView*)self.titleView).pictureView;
-                                        if (roomAvatarImageView && roomAvatarImageView.image)
-                                        {
-                                            roomAvatarImage = roomAvatarImageView.image;
+                                // Do not show sheet if users power level is lower than admin
+                                MXRoomPowerLevels *powerLevels = self.roomDataSource.roomState.powerLevels;
+                                if ([powerLevels powerLevelOfUserWithUserID:self.mainSession.myUser.userId] >= RoomPowerLevelAdmin)
+                                {
+                                    // Show sheet if no serverACL have been configured
+                                    [self.roomDataSource.room getCurrentRoomServerACLSettingsWithCompletion:^(NSString *serverACL)
+                                     {
+                                        if (serverACL == nil) {
+                                            self.wasFederationDecisionSheetShownBefore = true;
+                                            RoomFederationDecisionSheet *federationDecisionView = [[RoomFederationDecisionSheet alloc] init];
+                                            UIImage *roomAvatarImage;
+                                            MXKImageView *roomAvatarImageView = ((RoomTitleView*)self.titleView).pictureView;
+                                            if (roomAvatarImageView && roomAvatarImageView.image)
+                                            {
+                                                roomAvatarImage = roomAvatarImageView.image;
+                                            }
+                                            else
+                                            {
+                                                roomAvatarImage = [AvatarGenerator generateAvatarForMatrixItem:self.roomDataSource.roomId withDisplayName:self.roomDataSource.room.summary.displayName];
+                                            }
+                                            UIViewController *sheetViewController = [federationDecisionView makeViewControllerWithRoom:self.roomDataSource.room roomAvatarImage: roomAvatarImage];
+                                            sheetViewController.modalPresentationStyle = UIModalPresentationFormSheet;
+                                            [self presentViewController:sheetViewController animated:YES completion:nil];
                                         }
-                                        else
-                                        {
-                                            roomAvatarImage = [AvatarGenerator generateAvatarForMatrixItem:self.roomDataSource.roomId withDisplayName:self.roomDataSource.room.summary.displayName];
-                                        }
-                                        UIViewController *sheetViewController = [federationDecisionView makeViewControllerWithRoom:self.roomDataSource.room roomAvatarImage: roomAvatarImage];
-                                        sheetViewController.modalPresentationStyle = UIModalPresentationFormSheet;
-                                        [self presentViewController:sheetViewController animated:YES completion:nil];
-                                    }
-                                }];
+                                    }];
+                                }
                             }
-                        }
-                    }];
+                        }];
+                    }
                 }
             }
         }