Yes.
As Antioch explains in post #38, Putin hypnotized zElenskyy into mining the port of Odessa...
DAMN YOU, Putin!!
The mining of the port isn’t preventing ship passage through designated smoke-free passages.
What is stopping the flow of grain is the Russian blockade further out in the black sea.
The Russian ships are blockading grain exports out of the range of the Neptune missiles that sunk the black sea fleet’s flagship