Since the impact on the wall was so hard, the wall collapsed. And it's not like a plane can only be the cause of something like that. It's because the altitude the building what build at, since they were so high up and close to that wall, the rush of air forced them out with the remains of the building side.
When the director notices they spend too much of their budget on a few fights and goes, "Fuck! We have not much budget left. How can we hide it from the viewers in the best possible way? I know! Still images dragged for a long time + some cheap-ass artist drawing the not so important scenes. I'm a genius!"
SPOILERS~ idk why but when the building repaired itself it bothered me seeing theirs dust from the "explosion" but the Big as chunks of rock were placed perfectly back into the wall xD Like the fuk lmao, so can magic not fuk with tiny rocks that become dust but easily move buildings n shit x3