iCloud for Windows high CPU usage when PC is idle

After installing the new iCloud for Windows client on my Windows 10 VM, I've noticed that the iCloudhome.exe application used 60-80% of a CPU core constantly when the PC is idle. If you use the PC again, the usage immediately stops.

Look at this graph showing cores on my CPU. Core 08 (green line) is sitting consistently between 60% and 80% usage when the PC is idle from a 2:00am reboot until I come back to the PC at 10:14am, the usage drops back to normal.

What's running in this application that causes this? I have to kill the app manually after every reboot to stop this. I need the app for password/keychain sync!