Sudden loss of fragmented packets

Sometime over the past 24 hours a RB2011iL stopped passing the followups to fragmented packets from ether6 to ether8, the destination gets the initial packet, but no followups. Sniffing packets on ether6 show every piece of the packet, ether8 only shows the first piece. The log does not report any config changes have occurred since Feb 12.

Does anyone have ideas to troubleshoot this? I do not have any alternate hardware immediately on hand to swap.