That's because Namecheap reasons. Won domains there usually get cancelled. I have stopped bothering with their auctions for that exact reason.
There is no internal issue btw. I have carefully monitored domains that are registered with them, which I won on their platform, only to see them not bothering to push them to me and eventually getting expired.
In some cases I was the one who let them know the fact that won domains would expire the day after only to see the support cancel the auction instead of just run a renew and push them to me.