Russians have started moving into Donbas region this last couple of hours, last night targeted supplies and munitions in the North and West.
As Ukraine move south to reinforce, back door left open for Belarus to target Lviv and Kyiv unopposed, it makes no sense for the Russians to give up these areas taken, especially as they continue to push towards Odessa and Moldova, Putin may have said He only wants a corridor to Crimea, but that isn't how it reads to me, only a complete victory would seemingly appease him now.