I have the issue with HP 840 G3’s as well. I am booting the WinPE 10 wim using wimboot and similar to this article. https://forums.fogproject.org/topic/10944/using-fog-to-pxe-boot-into-your-favorite-installer-images/10
Works fine when I boot an ISO of WinPE 10 instead without using wimboot.
Did you figure out how to fix this?