This bugs also exist in Cisco 2911 running IOS version 15.4(1)T3 which severely degrade overall network performance and created unnecessary packet fragmentation and wasted massive 30% bandwidth.
As the result, this bugs under worst case scenario increase number of packets by doubling it [due to fragmentation] and any single packet lost will trigger 2-packet to be re-transmission [re-assembly packet will failed if one packet lost and required complete re-transmission].
This practically bring down the WAN links due to unnecessary re-transmission and bandwidth lost could be as high as 30% which is unbelievable high.
Would like to see CISCO releasing fixes for this ASAP.