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Date & Time: 4/14/22 8:30 am est
Frequency: every time the cutscene is viewed
World name: Faerie
Character name: Absenthine Starfrost
NPC name: Fourchenault
Party or solo: solo
Area and coordinates: Garlamald or wherever you are viewing the Unending Journey at

In the quest Frozen Hope, during the Endwalker role quest storyline, there is a cutscene of Fourchenault, your character and a few others talking to the refugees there in Garlamald. During the cutscene, Fourchenault uses the pronoun "he" incorrectly while playing as a female character.
He says in the cutscene: "But <character first name> here and his companions refused to forsake those we were otherwise unwilling to save."
A pronoun error doesn't occur if you are a male character, as I have asked a friend to test it in their Unending Journey. The error occurs every time after multiple viewings in The Unending Journey.