Prevent crash

app/src/main/java/eu/faircode/email/FragmentAccount.java

@@ -1054,7 +1054,7 @@ public class FragmentAccount extends FragmentBase {
                     fragment.setArguments(aargs);
                     fragment.setTargetFragment(FragmentAccount.this, REQUEST_SAVE);
                     fragment.show(getFragmentManager(), "account:save");
-                } else
+                } else if (getLifecycle().getCurrentState().isAtLeast(Lifecycle.State.RESUMED))
                     getFragmentManager().popBackStack();
             }
 
@@ -1346,7 +1346,8 @@ public class FragmentAccount extends FragmentBase {
 
             @Override
             protected void onExecuted(Bundle args, Void data) {
-                getFragmentManager().popBackStack();
+                if (getLifecycle().getCurrentState().isAtLeast(Lifecycle.State.RESUMED))
+                    getFragmentManager().popBackStack();
             }
 
             @Override

app/src/main/java/eu/faircode/email/FragmentFolder.java

@@ -42,6 +42,7 @@ import android.widget.TextView;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.constraintlayout.widget.Group;
+import androidx.lifecycle.Lifecycle;
 import androidx.preference.PreferenceManager;
 
 import com.google.android.material.snackbar.Snackbar;
@@ -258,7 +259,7 @@ public class FragmentFolder extends FragmentBase {
                         }
                     });
                     onSave(false);
-                } else
+                } else if (getLifecycle().getCurrentState().isAtLeast(Lifecycle.State.RESUMED))
                     getFragmentManager().popBackStack();
                 break;
 
@@ -508,7 +509,7 @@ public class FragmentFolder extends FragmentBase {
                     ask.setArguments(aargs);
                     ask.setTargetFragment(FragmentFolder.this, REQUEST_SAVE_CHANGES);
                     ask.show(getFragmentManager(), "folder:save");
-                } else
+                } else if (getLifecycle().getCurrentState().isAtLeast(Lifecycle.State.RESUMED))
                     getFragmentManager().popBackStack();
             }
 
@@ -549,7 +550,8 @@ public class FragmentFolder extends FragmentBase {
 
             @Override
             protected void onExecuted(Bundle args, Void data) {
-                getFragmentManager().popBackStack();
+                if (getLifecycle().getCurrentState().isAtLeast(Lifecycle.State.RESUMED))
+                    getFragmentManager().popBackStack();
             }
 
             @Override

app/src/main/java/eu/faircode/email/FragmentIdentity.java

@@ -58,6 +58,7 @@ import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.appcompat.app.AlertDialog;
 import androidx.constraintlayout.widget.Group;
+import androidx.lifecycle.Lifecycle;
 
 import com.google.android.material.snackbar.Snackbar;
 import com.google.android.material.textfield.TextInputLayout;
@@ -770,7 +771,7 @@ public class FragmentIdentity extends FragmentBase {
                     fragment.setArguments(aargs);
                     fragment.setTargetFragment(FragmentIdentity.this, REQUEST_SAVE);
                     fragment.show(getFragmentManager(), "identity:save");
-                } else
+                } else if (getLifecycle().getCurrentState().isAtLeast(Lifecycle.State.RESUMED))
                     getFragmentManager().popBackStack();
             }
 
@@ -1037,7 +1038,7 @@ public class FragmentIdentity extends FragmentBase {
                         }
                     });
                     onSave(false);
-                } else
+                } else if (getLifecycle().getCurrentState().isAtLeast(Lifecycle.State.RESUMED))
                     getFragmentManager().popBackStack();
                 break;
             case REQUEST_DELETE:
@@ -1085,7 +1086,8 @@ public class FragmentIdentity extends FragmentBase {
 
             @Override
             protected void onExecuted(Bundle args, Void data) {
-                getFragmentManager().popBackStack();
+                if (getLifecycle().getCurrentState().isAtLeast(Lifecycle.State.RESUMED))
+                    getFragmentManager().popBackStack();
             }
 
             @Override