Literally doesn’t matter as far as I can tell and as far as I’m aware there haven’t really been any major battles in that area, likely small numbers of troops on either side. If you look at a map and trace the frontline from north of Kharkiv all the way down to south of Izyum it pretty much just follows the rivers there (also between Izyum and Severodonetsk, but that’s beside the point) apart from the small salient straight north of Kharkiv. Comfy position to secure your flanks, avoid shelling from inside the city and focus on the actual battles down south. They weren’t going to assault the city anyway, so why sit there.
Literally doesn’t matter as far as I can tell and as far as I’m aware there haven’t really been any major battles in that area, likely small numbers of troops on either side. If you look at a map and trace the frontline from north of Kharkiv all the way down to south of Izyum it pretty much just follows the rivers there (also between Izyum and Severodonetsk, but that’s beside the point) apart from the small salient straight north of Kharkiv. Comfy position to secure your flanks, avoid shelling from inside the city and focus on the actual battles down south. They weren’t going to assault the city anyway, so why sit there.
That’s my interpretation at least.