Hello,
When I press Ctrl + F12 or even change to Shift + F12, service options are automatically selection. I've never had to do all services in sequence but it seems like this could be the case. I'm using P3D V4.2. Never had this issue before. I can not select ground handling agent, and even that comes up randomly midway through selecting services.
An example: I press Ctrl + F12 and the menu can show. I can then press Ctrl + F12 again and it will select a service I didn't necessarily want on it's own accord.