We've got a Server 2016 terminal server that roughly 60-80 people are logging onto remotely.
When a user logs off, the CPU spikes to 100% usage whereas during regular use the usage hovers between 10%-40%. Whenever these spikes happen explorer.exe for all connect users increases. Additonally, on the desktops of the remaining users the files on the desktop flicker in and out when this happens.
When looking at Procmon filtering explorer.ex it looks to like it's closing and then recreating recreating aspects of the user profile folders for all remaining users.