Ah, those aren't reverse lookups - they are wide area service discovery requests.
We've had indeed reports about some Apple devices spamming the network with those, along with some reports that those vanished after certain OS upgrades, but never established a reproducible root cause - see e.g. Constant DNS Service Discovery (Bonjour) from Apple device - #6 by Bucking_Horn.
I don't have any Apple equipment, so can't investigate myself.