Go to the item and click on '0 bids'.
You will be able to see the bidding history and the reason.
Most bidders use 'bid wrong amount' - although it's more likely they just changed their mind.
I always block people who withdraw bids.
"There are two ways to be fooled. One is to believe what isn't true; the other is to refuse to believe what is true.”
Søren Kierkegaard, Danish philosopher (1813 - 1855)