SBS Commander Robert Brovdi (Magyar) stated that the Russian command has banned military cargo transportation via the land road corridor to occupied Crimea.
He reported this on Telegram, Censor.NET reports .

More news in the Telegram channel Censor.NET
“From now on, logistics death marches to the occupier’s Crimea are allowed only by the stragglers. The official painting is in its own helplessness – the deflection is counted.”
“From June 7, by order of the commander of the Vostok Military District, military cargo traffic has been prohibited along the E58-Porozhnecha highway (the nickname of the R-280 Novorossiya), a section of the Mariupol-Berdyansk-Melitopol-Simferopol TOT, which has already decreased by 71% in two weeks,” the commander noted.
According to Brovdy, freight traffic on the aforementioned route has decreased by 71% over the past 14 days. In mid-May, the total traffic on the route was 11 thousand vehicles (Vehicles) per day, including 3.8 freight vehicles/day, and as of early June, it was already 6,500 VH/day, including 1.1 thousand freight vehicles.
At the same time, the SBS commander stated that “there is no question of total fire control of the route.”
“The collapse of traffic is not a blockade. But the current diet of the first land corridor, as a lifeline for the occupation group, is sensitive and effective,” Brody concluded. Джерело: https://censor.net/ua/n4007488
(C)CENSOR.NET 2026

I would say it is the Ukrainian command that has banned russian traffic on the highway of death.
Russia: Althought our victory is very close, we put Crimea on a food, gasoline, ammo, and weapons ‘diet’……………….
Crimea is choking and there is nothing the Kremlinals can do about it.
More likely the muscovites have banned military cargo that looks like military cargo. It will become difficult to distinguish it from civilian cargo, and that is probably the point.