Someone has a wish list hold on a book of mine for 48 hours. When I posted the book there were two wishers. Now that I have been waiting 45 hours I notice there are now zero wishers. Does this mean that

while I was waiting for a member to respond to an item they had wished for , the wisher behind them got a copy? Not sure if I made sense. :)

That could be what it means. It could also mean that the first wisher turned down the offer somewhere in there and your book is being held for the second wisher now. The system wouldn't send a notice on that, the posting time stamp would just change. Could also mean that the other wisher went on hold or cancelled their wish too,