Critical Issue
Description
Extra gaps might be inserted in Standard Clocking Mode (SCM), when Source/TX sends data to RX continuously without any data-valid gap, the Sink/RX interface could still de-assert data-valid to the user logic.
Resolution
To work around this problem a buffering scheme could be implemented to store some words first before forwarding a received packet.
This problem is scheduled to be fixed in a future release of the Quartus® Prime software.