The SDC function "set_max_skew" works incorrectly.

Just to add on here that you have to use constraint set_net_delay max/min together with max_skew to optimize and analyze the requirement you need https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/manual/mnl_sdctmq.pdf, pg2-58 & 2-60. You can reference to this example of use case in our DCFIFO IP https://www.intel.com/content/www/us/en/programmable/support/support-resources/knowledge-base/solutions/rd02232015_507.html