CSS skewY transition bug in Safari (desktop and mobile) - css

Question

The issue is visible when animating the skewY() property. Looks like the element's width shrinks down a little and no longer touches the sides of an equally wide container.
The same does not happen when animating with skewX() - the height is animated as expected.
I'm experiencing the bug in Safari only, both desktop and mobile browsers. Firefox and Chrome work as expected. This issue is visible during transition or animations only.
GIF previews:
Animation in Firefox/Chrome
Animation in Safari
.arrow {
position: absolute;
top: 20px;
left: 20px;
bottom: 20px;
right: 20px;
background-color: rgb(230, 230, 230);
}
.rect-x {
position: absolute;
left: calc(50vw - 50px);
top: 0;
width: 100px;
height: 100%;
background-color: blue;
animation: skew-x 1s linear alternate infinite;
transform-origin: center;
}
.rect-y {
position: absolute;
left: 0;
top: calc(50vh - 50px);
width: 100%;
height: 100px;
background-color: red;
animation: skew-y 1s linear alternate infinite;
transform-origin: center;
}
#keyframes skew-x {
0% { transform: skewX(15deg) skewY(0); }
to { transform: skewX(-15deg) skewY(-0);}
}
#keyframes skew-y {
0% { transform: skewX(0) skewY(15deg); }
to { transform: skewX(0) skewY(-15deg); }
}
<div class="arrow">
<div class="rect-y"></div>
<div class="rect-x"></div>
</div>

Answer 1

Try to use browser prefix.
.arrow {
position: absolute;
top: 20px;
left: 20px;
bottom: 20px;
right: 20px;
background-color: rgb(230, 230, 230);
}
.rect-x {
position: absolute;
left: calc(50vw - 50px);
top: 0;
width: 100px;
height: 100%;
background-color: blue;
animation: skew-x 1s linear alternate infinite;
-webkit-animation: skew-x 1s linear alternate infinite;
transform-origin: center;
-webkit-transform-origin: center;
}
.rect-y {
position: absolute;
left: 0;
top: calc(50vh - 50px);
width: 100%;
height: 100px;
background-color: red;
animation: skew-y 1s linear alternate infinite;
-webkit-animation: skew-y 1s linear alternate infinite;
transform-origin: center;
-webkit-transform-origin: center;
}
#keyframes skew-x {
0% { transform: skewX(15deg) skewY(0); }
to { transform: skewX(-15deg) skewY(-0);}
}
#-webkit-keyframes skew-x {
0% { -webkit-transform: skewX(15deg) skewY(0); }
to { -webkit-transform: skewX(-15deg) skewY(-0);}
}
#keyframes skew-y {
0% { transform: skewX(0) skewY(15deg); }
to { transform: skewX(0) skewY(-15deg); }
}
#-webkit-keyframes skew-y {
0% { -webkit-transform: skewX(0) skewY(15deg); }
to { -webkit-transform: skewX(0) skewY(-15deg); }
}
<div class="arrow">
<div class="rect-y"></div>
<div class="rect-x"></div>
</div>