Safari CSS transition on scale with border radius - css

Question

I came across a strange issue on Safari. Please take a look at: https://codepen.io/enguerranws/pen/PomzqWe
If you go hover the lightly red box, you'll notice a transition on an element inside.
If you test it in Chrome or Firefox, the animation runs as expected: it's a small black circle that scales up.
On Safari, it goes weird: it's a black square with some kind of transparency that goes round and fully opaque when the transition ends.
Here's the relevant part of code:
#test:hover #circle {
transform: scale(200);
}
#circle {
position: absolute;
transition: -webkit-transform .5s ease-in-out;
transition: transform .5s ease-in-out;
/* transition: all 1s ease; */
width: 2px;
height: 2px;
top: 30px;
border-radius: 10px;
mix-blend-mode: difference;
background-color: #000;
}
Does anyone as quick and dirty hack for this?
EDIT:
Actually, I found a way to get around this issue using width and height values for transform.

Answer 1

Try to use will-change: transform;. Added to your code:
#test {
width: 400px;
height: 400px;
position: relative;
overflow: hidden;
padding: 40% 10px;
background: rgba(255,0,0,.1);
}
#test:hover #circle {
transform: scale(1);
}
#circle {
position: absolute;
transition: transform .5s ease-in-out;
will-change: transform;
transform: scale(.005); /* point */
transform-origin:left top;
width: 2px;
height: 2px;
top: 30px;
border-radius: 400px;
width: 400px;
height: 400px;
background-color: #000;
}
<div id="test">
<div id="circle"></div>
Text here
</div>