A year-and-a-half after it was inadvertently revealed that there was a Starbucks franchise in or around Winterfell, the creators of Game of Thrones are still perplexed by how exactly the fuck that happened.

We know this from an exclusive excerpt for the book Fire Cannot Kill a Dragon (which comes out Tuesday), and in that excerpt David Benioff and Dan Weiss weighed in on how a coffee cup made an unexpected cameo that slipped past everyone while filming/editing the episode "The Last of the Starks" from the show's final season. For those in need of a reminder, Twitter makes it easy:

"I couldn't believe it," Benioff says in the book. "When we got the email about it the next day, I honestly thought someone was pranking us, because there had been things before where people were like, 'Oh, look at that plane in the background!' and somebody had Photoshopped it in. I thought, 'There's no way there's a coffee cup in there.' Then when I saw it on the TV I was like, 'How did I not see that?'`

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The mystery continues. #GameOfThrones' creators reflect on the final season coffee cup mistake, at the link in bio.

A post shared by Hollywood Reporter (@hollywoodreporter) on Oct 5, 2020 at 5:02pm PDT

Weiss added to that by saying that the obsession with nailing the scene led the obvious to be overlooked.

While modern technology allowed eagle-eyed viewers to shit on the screw-up in real time via memes, it also allowed for the gaffe to be scrubbed from the episode's re-runs. Feel free to note that season 8 had its share of issues.