A Stop error code 0xE6 is displayed on a blue screen when the computer resumes from sleep or power off state. This occurs when Thunderbolt docks are connected or disconnected from the computer. This is exhibited on Windows 10 20H1 (2004). All HP platforms that support Kernel DMA Protection may be affected. Units with at least one Thunderbolt port, with Kernel DMA Protection enabled and Windows Hypervisor Platform disabled are affected.
Intel and Microsoft discovered incompatibility issues when Windows 10, version 2004 (Windows 10 May 2020 Update) is used with certain settings while a Thunderbolt dock is in use.
Refer to the following URL for known issues with Windows 10, version 2004:
https://docs.microsoft.com/en-us/windows/release-information/status-windows-10-2004#422msgdesc.