Unlike most design patents, this one faced a non-final rejection on its path to issuance. 

Like many design patents that do get rejections, this one was based on § 112:

https://files.mastodon.social/media_attachments/files/111/131/477/049/626/116/original/06c7f67908213720.jpg 

 The examiner also suggested some clarification to the descriptions of the drawings:

https://files.mastodon.social/media_attachments/files/111/131/484/067/262/360/original/38020674b482a4d5.jpg