If there are technical issues at the time an auction would end, or just before, we will usually extend that auction by 24 hours.
We do this in order to give all participants an equally fair chance.
In these cases, we also extend auctions that would be ending within a couple of hours after the technical issue has been solved - this in order to have some safety-margins.
When auctions are extended because of technical issues, we show a short information about that on the item-page.
We also extend auctions if they receive bids close to their ending time. read more here.