I have selected a custom lock screen image for my windows 10 machine. The image shows correctly if I press the lock button while logged in, but if I reboot the machine, the image shown on the lock screen is not my custom one.
I have googled well and come up empty, even after trying registry editing.
Windows Version 1803 Build 17134.407
I am not on a domain and there are no policies in effect. It is a relatively new installation as well.