because the UA ran or surrendered?
The city got semi-encircled, with a single quadrant being left open.
This is now a traditional Russian tactic. Instead of effecting complete encirclements, they leave them a single path of retreat. Typically, the entire extraction
route is shot through with artillery, drones, and small arms fire.
It's cheaper, easier, and still manages to inflict substantial casualties on Ukraine. However, it prevents the wholesale destruction of formations, but rather leaves some pieces intact from which the unit can be eventually regenerated.
Is Russia trying to talk sense into the UA to surrender?
Russia doesn't want to talk to Ukraine. Ukraine should want to to talk to Russia.