I bought the surface pro X on May/2021. The issue has been recorded here. Initially, it hibernate after turning on for a few seconds. After I disable the hibernation mode, It shut down twice today.
https://answers.microsoft.com/en-us/surface/forum/surfacepro-surfver_surfprox-surftop_battery/surface-pro-x-without-surface-keyboard-randomly/f6ea5d12-177e-4c37-bbec-b3ad962b9c79?auth=1
I am not sure if this issue will get worse in the future or not. If no one is giving me any help about how to debug this, I have to return this device.
I have another HP desktop with Windows 10, which I never see it shut down by itself.
Regards
Galvin