dmvpn issue !

I've few sites setup dmvpn. recently one of the spoke site lan is not
accessible from the hub. but the router tunnel interface is accessible
from the same hub. There's no problem when other spoke & hub connect to
this spoke. I think there's no issue with the dnvpn configuration
parameter. From both hub & spoke router, I can see the tunnel
established and the router registered the nhrp cache. Any idea ? Below
is our dmvpn configuration for your reference :
interface Tunnel1
bandwidth 128
ip address
no ip redirects
ip mtu 1400
ip hold-time eigrp 5 30
ip nhrp map
ip nhrp map multicast
ip nhrp network-id xxxxxxxx
ip nhrp nhs
ip nhrp registration timeout 60
ip nhrp shortcut
delay 2000
tunnel source Loopback0
tunnel mode gre multipoint
tunnel key xxxxxxxx
tunnel protection ipsec profile GRE shared
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