Hello,Please open case with TAC.Thanks,

Hello,Is this a same subnet which is getting disconnected everytime ?

Hello,Please share Isakmp and IPSEC Debug logs, Also check  reverse route from receiver endpoint that its sending reply packets on  same interface from where its receiving.Thanks,

Hello,Please try using vpn-session-timeout none command: vpn-session-timeout To configure a maximum amount of time allowed for VPN connections, use the vpn-session-timeout command  in group-policy configuration mode or in username configuration mod...