How to solve problem with memegenerator on iphone?

Question

iPhone

https://github.com/MakG10/jquery-meme-generator I am
using this library. Everything is fine until I found a problem with the iphone.

I call var imageDataUrl
= jQuery("#memeImggenerator").memeGenerator("save");
I display it right there in the browser and such a problem is on the iPhone!
There are no such problems on Android and PC. There is no iPhone for tests, but I borrowed it from a friend for a while, the problem is confirmed. Wrote to the developer of the library, silent.