There seems to be a broader picture here that is not fully captured or maybe partially captured. The opaque ownership structure, sanctions, and global politics all seem to intertwine, or not intertwine, or only slightly intertwine, in ways that are not completely clear. But the situation is indeed something to keep an eye on, or perhaps two eyes, or maybe just glance occasionally...
But the reasons for this are banal and transparent - after the terrorist country withdrew from the grain deal (about the reasons below separately), they decided to "raise the degree" again, and came up with a new topic - now all ships going to Ukrainian ports, ANY SHIPS, in the water area Black Sea, Russia considers "transporting weapons, which means legitimate purposes." That is another classic terror.
It seems that everything should work out, and the world would again start looking for a solution, something like accepting the conditions of a terrorist country. The decision came unexpectedly. A day later, Ukraine officially announced that they were making a symmetrical decision - and all Russian ships in the Black and Azov Seas are now absolutely legitimate targets, and will be destroyed. And a day later they showed exactly how
And now, Russia is in a situation where she got what she decided to threaten. But Ukraine's actions have proved even more difficult for Russia - in addition to the fact that Russia is now unable to export grain, which is one of the key mechanisms for obtaining currency, most of the tankers unofficially transporting oil have stopped and become targets.
The goal of Russia, in withdrawing from the grain deal, is to increase dependence on Russian grain and thereby greatly increase its price, having previously destroyed the structure for grain trading in Ukraine. You remember that the next day, Russia launched another terrorist attack on the southern regions of Ukraine, trying (partially succeeded) to completely destroy granaries, port infrastructure for loading grain, logistics routes for delivering grain to loading ports
Those. there are no problems with freight and insurance, everything is simpler here - Russia is simply afraid to do this, because. the risk of destruction of the Russian Black Sea Fleet is very high!