I downloaded the latest image after the AU release. Have been using it to slowly update our Surface Fleet. When U run the Setup, I select check for updates and Keep Files and apps. Then it freezes on every one on the reboot.
Force a power off, Power it back on, let it do it's thing, then loging and check for more updates.
Usually have about 2 more small update cycles that I reboot between.
When all is done, I check and the CPU is fluctuating as normal.
My tablet was the first one I had working and has still been running well.