In the first volume of Stranger Things Season 5, viewers noticed a glaring discrepancy involving Will Byers and Jonathan Byers: a flashback shows the two brothers building Castle Byers on a bright sunny day, with cheerful expressions, a stark contrast to how that same memory was described in Season 1. In the earlier account, Jonathan said the fort was built overnight as their father left, during heavy rain that left them both sick for a week.

Fans quickly called out the inconsistency as a continuity error, pointing out how the tone of the flashback doesn’t match the emotional weight and setting of the original memory. The creators, the writing team of Stranger Things, have previously acknowledged similar slip-ups, such as forgetting a character’s birthday, which they treated with apologies.