Russian military logistics rely on railways because the roads are so shit. Saboteurs keep attacking railways, though there hasn't been much of that seen in the public domain recently because by taking the ground they did in the summer offensive, they nullified the Belgorod rail route and the other routes are too far behind the lines, anyway that's way off tangent
The problem here isn't really with logistics any more, it's more about not actually having the stockpiles they thought they had. Russian stockpiles have proved to be depleted through black market sales of inventory (Corruption) and poor warehousing conditions (corruption again).
Even their missile attack the other day in retaliation for the Sevastopol Fuel depo / refinery attack was a tad pathetic in comparison to previous attacks. In the past they've launched up to a hundred or so missiles, this time it was less than 20. And in an attempt to get a good news story they attacked a warehouse that was packed with solid fuel sections of old Russian ICBMs that were in the process of being decommissioned. It made a huge explosion but all they did was make a huge explosion. They'll have spun that in Russia as a huge military target with massive losses of equipment and ammo. They are desperate