Hi have a solution with PFR with two master controller in hsrp mode and two active border controller, betwen the MC and the BR i'm running EIGRP. The two BR have BGP to the ISP but i have default router for the parent route. Same weeks ago i notice some problems in reaching to specific public ip addr. During the trobleshooting i found that the two border controller have dynamic-pbr applyed to the inside interfaces and one of the satement on the dynamic route-map is setting the next-hop for the destination public ip addr yhe inside interface on the two border routers. This way the traffic is looping betewn the two BR. It's possibel do disable the PIRO (PBR) and only to use static route injection betwen the MC and BR.
The routers are running 12.4.24T