This will ensure the onPause method of removed fragment is called before onResume of the new one

src/android/org/linphone/activities/LinphoneActivity.java

@@ -486,6 +486,7 @@ public class LinphoneActivity extends LinphoneGenericActivity implements OnClick
 			}
 		}
 
+		Compatibility.setFragmentTransactionReorderingAllowed(transaction, false);
 		transaction.replace(R.id.fragmentContainer, newFragment, newFragmentType.toString());
 		transaction.commitAllowingStateLoss();
 		fm.executePendingTransactions();

src/android/org/linphone/chat/ChatListFragment.java

@@ -141,7 +141,7 @@ public class ChatListFragment extends Fragment implements OnItemClickListener, C
 
 		refreshChatRoomsList();
 	}
-	
+
 	@Override
 	public void onPause() {
 		Core lc = LinphoneManager.getLcIfManagerNotDestroyedOrNull();

src/android/org/linphone/chat/ChatRoomsAdapter.java

@@ -110,6 +110,9 @@ public class ChatRoomsAdapter extends ListSelectionAdapter {
 	}
 
 	public void clear() {
+		for (ChatRoom room : mRooms) {
+			room.setListener(null);
+		}
 		mRooms.clear();
 	}
 

src/android/org/linphone/compatibility/ApiSixteenPlus.java

@@ -3,6 +3,7 @@ package org.linphone.compatibility;
 import org.linphone.R;
 
 import android.annotation.TargetApi;
+import android.app.FragmentTransaction;
 import android.app.Notification;
 import android.app.PendingIntent;
 import android.content.Context;
@@ -142,4 +143,8 @@ public class ApiSixteenPlus {
 	public static void startService(Context context, Intent intent) {
 		context.startService(intent);
 	}
+
+	public static void setFragmentTransactionReorderingAllowed(FragmentTransaction transaction, boolean allowed) {
+
+	}
 }

src/android/org/linphone/compatibility/ApiTwentySixPlus.java

@@ -2,6 +2,7 @@ package org.linphone.compatibility;
 
 
 import android.annotation.TargetApi;
+import android.app.FragmentTransaction;
 import android.app.Notification;
 import android.app.NotificationChannel;
 import android.app.NotificationManager;
@@ -180,4 +181,8 @@ public class ApiTwentySixPlus {
 	public static void startService(Context context, Intent intent) {
 		context.startForegroundService(intent);
 	}
+
+	public static void setFragmentTransactionReorderingAllowed(FragmentTransaction transaction, boolean allowed) {
+		transaction.setReorderingAllowed(allowed);
+	}
 }

src/android/org/linphone/compatibility/Compatibility.java

@@ -20,6 +20,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 import org.linphone.mediastream.Version;
 
 import android.app.AlarmManager;
+import android.app.FragmentTransaction;
 import android.app.Notification;
 import android.app.PendingIntent;
 import android.content.Context;
@@ -163,4 +164,10 @@ public class Compatibility {
 			ApiSixteenPlus.startService(context, intent);
 		}
 	}
+
+	public static void setFragmentTransactionReorderingAllowed(FragmentTransaction transaction, boolean allowed) {
+		if (Version.sdkAboveOrEqual(Version.API26_O_80)) {
+			ApiTwentySixPlus.setFragmentTransactionReorderingAllowed(transaction, allowed);
+		}
+	}
 }