MX204 tunnel services BW

Encountered an issue with an MX204 using all 4x100G ports and a logical tunnel to hairpin a VRF. The tunnel started dropping packets around 8Gbps. I bumped up tunnel-services BW from 10G to 100G which made the problem worse; the tunnel was now limited to around 1.3Gbps. To my knowledge with Trio PFE you shouldn't have to disable a physical port to allocate bandwidth for tunnel-services. Any helpful info is appreciated.