If PXE Boot Fails, It does not exit - It hangs

This is more of a general question about PXE Boot for the community. We have a few computers that do not exit on their own out of PXE boot if they don't have a job. They hang at "PXE-M0F: Exiting Intel Boot Agent.". The only way to exit out of the screen, is to use "ALT+CTRL+DEL". I'm just curious if others if experienced the same thing and if using automation folders on computers that are having an issue with PXE, would be a fair option? We'd like to use PXE where we can.