I think tcrlaf is talking about UK re-enforcements from the west of Donetsk being cut off from the eastern front, and Mauripol does indeed have a road linking it to Amvrosiyevka which would be opened again to rebel traffic if the rebels take it.
With the Ukrainian side busy destroying phantom columns of Russians, no wonder the rebels are slowly turning the tide. This video from the front might be instructive to you in that regard.
You can tell who is a Russian sleeper agent when you find them trying to demoralize Americans, who are not even fighting in the war, and to believe the Russians are winning. Regular Americans would not be cheering for the Russkies or spreading war-disinformation which doesn't affect any of us directly in any way.
As for the war going on, Ukraine has retaken 60 percent of formerly separatist held territory and are currently inside Luhansk. You Russkies have been telling us for weeks and weeks now that the Ukrainians have been losing and supposedly hiding staggering numbers of war dead, but this is the end result of it.