This is likely an issue with mutter (gnome-shell), when an application launcher is clicked it starts the spinning animation, once the app is mapped to the screen it should send some “ready” notification to gnome-shell to stop the spinning animation, I guess the latter part is not happening so the spinner keeps running until it times out (IIRC that’s 15 or 20 sec)…
@rubi1200 is correct, you should file a bug against gnome-shell