AM2434: dual port switch with lwip：is need some modify with lwip statck？

Part Number: AM2434

Hi expert，

       I am test the patch at blow link at MCU SDK 8.4 version：

   https://e2e.ti.com/support/microcontrollers/arm-based-microcontrollers-group/arm-based-microcontrollers/f/arm-based-microcontrollers-forum/1160371/mcu-plus-sdk-am243x-dual-port-icssg-sdk-08-04/4366415?tisearch=e2e-sitesearch&keymatch=dual%252520port#4366415

    but it not seems work as expect: we use two port to send data to Am243x ， on Am243x side，  at beginning，we can receive packets from both. but  after 30 packets about，we can only receive from

 one port only. is it extra modify for lwip need?