Russian Forces
Advance: 7.31 km²
Top Right Advance = 4.58km2, Lower Left Advance = 2.73km2
Swinging all the way up to northern Kharkiv, in and around Vovchansk Ukrainian defences fell apart. Following on from the earlier successes, Russian assault groups wasted no time pushing deep into southern Vovchansk, capturing several more streets, the cemetary and entering the industrial zone on the southern edge of the town (the main Ukrainian ‘stronghold’).
As for the northern side of Vovchansk, whilst Suriyak has marked some large Russian advances only part of these are new. All of the town centre north of the Vovcha River has in my opinion been under Russian control for a long time now, with Ukraine not seen in that area for many many months. The area east of this is a new advance though, with Russian forces recapturing the village of Tykhe after Ukraine was forced to withdraw back over the river. The Russians have also reportedly crossed the Vovcha in eastern Vovchansk and are starting to clear the streets there, where they will eventually link up with the other assault groups to the southwest.
I would not call this a localised collapse (yet), just a failing of the Ukrainian garrison resulting in them being forced out rather quickly. Russia didn't redeploy any forces to this area recently, so it has been the same units operating here for months now. For Ukraine it's the same, but that is the core issue. Ukraine needed more forces here as the existing units were getting worn down by drone strikes, artillery, etc. whilst the Russians slowly probed and pushed, growing more confident over time as they weeded out Ukrainian positions and destroyed equipment. They needed to reinforce this area and rotate their troops, but because of the intense fighting on other fronts (Pokrovsk, Kostyantynivka, Kupyansk) there was no one they could send. Some areas draw the short straw as Ukraine has to prioritise the resources they have and in this case it was Vovchansk.