Openlp takes a long time (2-3 minutes) to close. Here is the log entry that shows the closing.
2022-02-18 15:01:17,719 Dummy-2 asyncio ERROR Task was destroyed but it is pending! task: <Task pending name='Task-3' coro=<IocpProactor.accept.<locals>.accept_coro() running at asyncio\windows_events.py:566> wait_for=<_OverlappedFuture cancelled>>
SYSTEM is OMEN Laptop Win 11 AMD RYZEN 5000 series 6-core; GPUs AMD Radeon on board internal display and NVIDIA RTX external display
Run Openlp a second time on the same machine, and closing is faster.