All content in a block with "transform" is distorted - css

Question

Below, you can see two same figures (rhombus). All content in 2nd and 4th blocks is distorted. It happens because of one of the following reasons:
If .outer div has overflow: hidden;
If .content div has transform: rotateY(0deg) or backface-visibility: hidden; (in Chrome)
If .content3d div has transform-style: preserve-3d; (in Firefox)
How to fix it without removing the css properties that are mentioned above?
body {
font-family: Arial;
}
div {
width: 100%;
height: 100%;
}
img {
height: 100%;
margin: -20%;
}
.outer {
float: left;
width: 200px;
height: 200px;
overflow: hidden;
-webkit-transform: rotate(45deg);
transform: rotate(45deg);
border: 1px solid #000;
margin: 50px;
}
.inner {
line-height: 200px;
-webkit-transform: rotate(-45deg);
transform: rotate(-45deg);
font-size: 40px;
font-weight: bold;
text-align: center;
color: #000;
}
.content3d {
-webkit-transform-style: preserve-3d;
transform-style: preserve-3d;
}
.content {
-webkit-transform: rotateY(0deg);
transform: rotateY(0deg);
}
<div class="outer">
<div class="inner">
<img src="https://pixabay.com/static/uploads/photo/2015/12/25/13/07/plant-1107586_960_720.jpg">
</div>
</div>
<div class="outer">
<div class="inner">
<div class="content3d">
<div class="content">
<img src="https://pixabay.com/static/uploads/photo/2015/12/25/13/07/plant-1107586_960_720.jpg">
</div>
</div>
</div>
</div>
<div class="outer" style="clear: both;">
<div class="inner">
TEXT
</div>
</div>
<div class="outer">
<div class="inner">
<div class="content3d">
<div class="content">
TEXT
</div>
</div>
</div>
</div>

Answer 1

It looks like your transforms are causing the issue:
.content {
-webkit-transform: rotateY(0deg);
transform: rotateY(0deg);
}
It doesn't look like they are doing anything, why do you have them in there?