Why is the rx_st_valid signal not asserted in the Intel® L- and H-tile Avalon® Streaming for PCI Express* IP when receiving an Unsupported Request (UR) completion?

Description

Due to a problem with the Intel® Quartus® Prime Pro Edition Software version 20.4 and earlier, you may encounter the above problem when receiving an Unsupported Request (UR) completion on physical functions(PF) 2 and 3.

Resolution

This problem is fixed starting with the Intel® Quartus® Prime Pro Edition Software version 21.1.