A mistake in the “Battle of the Bastards” episode of “Game of Thrones” that you might have missed

Click the picture to see the source.

The prop used for Jon Snow’s Valyrian steel sword when sheathed works just fine in non-action scenes. However, when he hurriedly mounted his horse in the most recent episode, The Battle of the Bastards, it certainly didn’t behave like an object forged from an incredibly strong metal whose recipe is lost to history.

Thanks to David Janes for the find!