The Sandbox FAQ indicates that Split tunnelling is enabled on the VPN so only traffic destined for the lab will transverse the tunnel. All other traffic, including internet and LAN, will remain local.
I'm not experiencing this in my Sandbox, I lose access to my local LAN resources when I connect.
BTW, my AnyConnect client is configured to allow local LAN access when using VPN.
Perhaps this is just coincidental, but before the maintenance window last month, I was not experiencing this issue when using a sandbox.
Thanks in advance for any guidance.