Ios WeChat cannot save pictures under multi-channel.

  node.js, question

For example, I have 3 pictures, a background, a two-dimensional code dynamically generated by WeChat, and a user’s avatar (which is also dynamic).
Then it is superimposed by the watermark of the picture, but after the link is added with “|”, press the picture on ios WeChat inside, and then choose to save the picture. The picture cannot be saved (Android means it can be saved normally). If I use style, but my QR code is dynamic, and the user’s head is also dynamic, I don’t know how to do it. I hope the “|” symbol can be removed.

Nodejs I used a third-party library (QN)

Landlord, have you solved it yet?