It looks like the close issue is still there, here is what I am seeing in the command line after I close the app (feather-2.6.5)

[2024-03-15 01:18:23 D] (:0) Storing wallet

[2024-03-15 01:19:14 D] (:0) virtual void MainWindow::closeEvent(QCloseEvent*)

[2024-03-15 01:19:14 D] (:0) closing Window

[2024-03-15 01:19:14 D] (:0) No wizards in progress and no wallets open, quitting application.

[2024-03-15 01:19:14 D] (:0) void WindowManager::close()

[2024-03-15 01:19:14 W] (:0) QCoreApplication::postEvent: Unexpected null receiver

[2024-03-15 01:19:14 W] (:0) QCoreApplication::postEvent: Unexpected null receiver

[2024-03-15 01:19:14 D] (:0) ~MainWindow

[2024-03-15 01:19:14 W] (:0) QEventLoop: Cannot be used without QApplication