Anyone else's bunny snore??

Mr Fluffs started a couple of weeks ago... only in the evenings, only when he's flopped out (and I think sleeping deeply)

It's sweet but I'm slightly concerned it might indicate lung problems. His breathing rate is normal and otherwise quiet... I'll probably check with the vet anyway. But just wondered- any more snorers out there??

Nutmeg snores but she has a known slight lung problem left over from snuffles before I got her.