Yeah. Maybe I should read the article. Tip vortices would definitely cause a problem for the lower wing.
But I heard about this as a kid in the ‘60s, that the Spits would just give ‘em a calibrated whack. Maybe an interpretation that observers on the ground saw.
They just put the tip under the buzz bombs wingtip and gave a yank back on the stick causing the gyros in the BB to topple and down it would go.