WVD User Session

Is there a away to keep the user(s) session even if you disconnect or reboot the WVD VMs? Like a persistent session. I already have  a GPO to keep active session. 

Scenario: I have 3 WVD on a pool, and using a FSlogix profile. I have user(s) session shows active or disconnects on those VMs. I need to work on maintenance on one of the VMs that has those user sessions.  The moment I reboot the VM the session doesn't transfer automatically.  It seems like it keeps creating a new session.  Anybody else having this behavior and is there a way around this?