We see some strange behavior at a customer site..
Instant Clones won't be deleted at reboot, only at logoff, sometimes after a user initiated reboot, the VM will return with disks and all the profiles on it.
We also see that VMware tools is not responding to the vCenter.
LogOff most of the times works fine (not seen issues there yet)...
Checked this post : VMware Horizon 7: Instant Clone Pools Delete VMs on Restart
But this is not the case...