LAN Pool cant communicate over L2L VPN on AdvanceSecurity IOS

Question

Hi i have strange issue, when i upgraded my Cisco Router IOS of Advance Security IOS before that all was good on advanceipservices.
IPSEC VPN is up
But No traffic Passing.
Traffic does pass if i make Source IP as loop back on same router A having VPN (Loopback 100) , but traffic dont pass/cannot ping when i try to generate it from my one hope before the router that is my CORE switches by creating loopback on CORE switch.
is this IOS behaving like ASA? do i need to enable some kind of security levels on interfaces? or statefull issue etc? any help would be great
VPN Router A
for understanding
GigabitEthernet0/0.1       10.174.1.4
GigabitEthernet0/0.202     222.125.139.225
Loopback 100 100.100.100.100
ip route 101.101.101.101 255.255.255.255 GigabitEthernet0/0.202
VPN Router B
GigabitEthernet0/0.1       10.110.1.4
GigabitEthernet0/0.202     203.126.123.145
Loopback 101 101.101.101.101
ip route 100.100.100.100 255.255.255.255 GigabitEthernet0/0.202
again: VPN dont have any issue in itself, since when loopback are made on routers they do ping, and when i create same loop back on my core switches it done ( i do proper static routing when i move loopback on core so routing is not issue )

Answer 1

My issues is resvoled by upgrading to advance ip services again.
so its some feature or bug with IOS for sure, since config was untouched