I have been having this issue for a while. I am running PMP 2.9, but this has been an issue since the move to 2.0.
I have an intel NUC running Windows 10 (fully updated) and PMP. I have an HDMI cable from the computer, to a Yamaha Receiver, to a Sony Projector. Every time I shut off the receiver, and the Projector with PMP running, this shows when I turn it back on.
I wasn't sure if there was a trick I could try that works, as nothing I have tried has worked so far.
Thanks