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Problematic ICMP redirects with PfR

I administer a 3 site WAN connected by an MPLS network, and I use DMVPN with PfR for improving bandwidth for low priority traffic and providing failover for the MPLS links (see image below). From time to time, I'll run into a random issue with ICMP redirects between the PfR master and border at the hub site. This only seems to happen after a router crash (e.g. both 2911s experienced a software crash the other day) or a power failure. When the redirect loop occurs, I cannot see any evidence in the PfR traffic classes, but I always forget to check the dynamic route maps. Clearing the PfR border process on the DMVPN hub resolves the redirect loop. I do need to update the IOS images, but none are terribly far behind, and I'd like to see if anyone else has had a similar issue. Thoughts?

WAN.png

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