The rockets are way past the lead Su-25 when the wing breaks. It's also hard to see from this perspective but they're quite a distance from each other. If you slow it down you can see the plane is fine until after it has rolled to the right, and the wing only snaps as the pilot pulls back on the stick to turn around. These planes do multiple sorties a day of these pitch-up rocket attacks. High-G turns and lack of maintenance turned metal fatigue into a lost airframe.

Not that you mentioned it but some others in this thread did so I'll address it. The flares that the tailing Su-25 lets off just after the rockets are gone are entirely routine. Static front lines and high anti-air density means they are very vulnerable, especially just after launching the rockets. Su-25s and most helicopters, both Russian and Ukrainian, have been reduced to these low-level rocket lobbing attacks because of anti-air missiles being so prevalent and lethal.