Why animation is buggy in Safari?

Question

css

There are 4 cards on the site that turn over on click. Everywhere everything works smoothly and only in Safari there is a glitch (from a mobile phone for sure, from a desktop there is no way to check). After flipping the card to the front side, the background jerkily pulls up. What is most interesting is that only three of the four cards have a glitch, despite the fact that the code for all is the same. Almost all testers have iPhones, so they need to fix it, and I don’t even know where to dig.
Z.Y. I installed the jquery flip library, rewrote one buggy card - the lag remained. Maybe you should turn off the animation properties one by one and see what the problem is?