A good point highlighted in that post:

The Rich Starry is loaded with 250,000 barrels of methanol that it loaded at the Emirati port of Hamriyah, according to the data. It could be that fact that has ensured the unobstructed passage of the vessel, despite the sanctions. The U.S. Central Command said the blockade would only cover Iranian ports and traffic to and from them.

Trump admin limited the scope of the “blockade” only to ships that dock at Iranian ports.