Cisco VPN :: 891 - VTI Failing And Not Reinitializing

I'm running a Cisco 891 it has both crypto maps and ipsec VTI's running on the external interface. The cryto maps are for sites that do not have a cisco router and the Tunnels are for the sites that use crypto maps work perfectly fine. But I much prefer using unnels as it gives a routable interface, ospf works ect.
 
The tunnel interfaces will periodicly fail (Line protocol down) at no set interval, they will then not come back up again. To bring them back up I either have to shutdown and then re-enable the interface or run "clear cry ses rem *.*.*.*"
 
Logging with isakmp and ipsec errors provides the following:
55801: *May  1 10:31:16.015: ISAKMP:(0):Can't decrement IKE Call Admission Control stat incoming_active since it's already 0.55802: *May  1 10:31:16.015: ISAKMP:

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