Those Russians in the line between the two incursions must be getting twitchy at the thought of those Ukrainian forces rampaging along their flanks - there are rumours on Twitter of a wider collapse in this area and also to the east of Lyman, both as yet unconfirmed. It does make one wonder if Russia is capable of defending in depth, and manouevring against the Ukes.
I wonder, did Putin really think his declaration on Friday would mean "mission accomplished"? As the adage goes, your opponent always has a say in proceedings.