Have had it two or three times.
Once was on descent into Bathurst Island north of Darwin, I could hear traffic in the Horn Island CTAF as clear as day.
Another was at 1500' on downwind at Lord Howe Island and hearing traffic back on the mainland,
There was one other but I can't remember where it was other than that the location in the CTAF call was along way away and I was very low, (for VHF reception) Might have been Albury Tower and Armidale CTAF....
Has always been in the morning, probably the first hour or two after sunrise.