Why does the Intel® Stratix® 10 E-tile Hard IP for Ethernet Intel FPGA IP core forward RX truncated invalid frames to user logic?

The v18.0 Intel® Stratix® 10 E-tile Hard IP for Ethernet Intel FPGA IP core has a problem with oversized frame stripping.

When the RX MAC receives a frame size >= 65536, and enforce_max_frame_size is enabled, the frame output from RX MAC to user logic will be truncated to frame size specified by max_rx_frame_size settings, and a second invalid frame will output from the RX MAC to user logic starting from 65536-byte to the end of the super large frame.