Flexbox on ie11: stretching images for no reason- Flexbox on IE11: image stretched for no reason?

problem ：

I'm having an issue with flexbox on IE11 and while I'm aware there's lots of known issue, I haven't been able to find a solution... I am here IE11 Upper flexbox Have a problem , Although I know there are many known problems , But I can't find a solution ...

<div class="latest-posts">    <article class="post-grid">        <img src="http://lorempixel.com/image_output/cats-q-c-640-480-4.jpg" alt="" />        <div class="article-content">             <h2>THIS IS POST TITLE</h2>             <p>BLAH</p>        </div>    </article></div>

And the CSS... also CSS ...

img {  max-width: 100%;}.latest-posts {  margin: 30px auto;}article.post-grid {  width: 375px;  float: left;  margin: 0 25px 100px 0;  padding-bottom: 20px;  background-color: #fff;  border: 1px solid #f3f3f3;  border-radius: 2px;  font-size: 14px;  line-height: 26px;  display: flex;  flex: 1 0 auto;  flex-direction: column;  justify-content: flex-start;  align-content: flex-start;}.article-content {  padding: 20px 35px;}

Images are getting stretched within a flex container. The image is in flex The container is stretched .

Applying align-items: flex-start (I figured, since "stretched" is the default value...) or justify-content: flex-start doesn't seem to work. application align-items: flex-start （ In my submission , because “ stretched” Is the default value ...） or justify-content: flex-start It doesn't seem to work .

Codepen: example of what I meanCodepen： Example of what I mean

What am I doing wrong? What on earth did I do wrong ？

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Solution ：

Reference resources ： https://stackoom.com/en/question/2UVBC