Who rated this post

Do you have "disable NAT in VPN community" set?  Almost sounds like you have a NAT of some kind just for that .81 address which would allow the traffic to enter the tunnel but then get dropped on the other end.  If the destination IP is getting NATted that could be why the traffic seems to disappear in your capture after the inbound.

I assume there is no Windows Firewall on .81?  If the traffic can be verified to be entering the tunnel properly on your side, you may need a packet capture on the .81 host to confirm the traffic is actually getting there.  Had many a troubleshooting session where the traffic is going into the tunnel properly and the other end insists it is decrypting and reaching the endpoint on their side...but it isn't due to a VPN config/policy or routing issue.  Until you do that packet capture they will just blame you 🙂