issue with z-index and dropdown menu IE11 - html

Question

I have an issue with my dropdown menu. I have a table and at the end of each row i have a dropdown menu like that :
When i hover the menu on every browser i got this :
Except on IE11 :
Here is my CSS :
#dropdown_classe {
margin: 10px 0 20px 0;
font-family: Helvetica Neue, Helvetica, Arial, sans-serif;
}
#dropdown_classe .wrapper {
display: inline-block;
width: 180px;
margin: 0 10px 0 0;
height: 20px;
position: relative;
}
#dropdown_classe .parent {
height: 100%;
width: 100%;
display: block;
cursor: pointer;
line-height: 30px;
height: 30px;
border-radius: 5px;
background: #F9F9F9;
border: 1px solid #AAA;
border-bottom: 1px solid #777;
color: #282D31;
font-weight: bold;
font-size: 13px;
z-index: 2;
position: relative;
-webkit-transition: border-radius .1s linear, background .1s linear, z-index 0s linear;
-webkit-transition-delay: .8s;
text-align: center;
}
#dropdown_classe .parent:hover,
#dropdown_classe .content:hover ~ .parent {
background: #fff;
-webkit-transition-delay: 0s, 0s, 0s;
}
#dropdown_classe .content:hover ~ .parent {
border-bottom-left-radius: 0;
border-bottom-right-radius: 0;
z-index: 0;
}
#dropdown_classe .content {
position: absolute;
top: 0;
display: block;
z-index: 1;
height: 0;
width: 180px;
padding-top: 30px;
-webkit-transition: height .3s ease;
-webkit-transition-delay: .2s;
border: 1px solid #777;
border-radius: 5px;
box-shadow: 0 1px 2px rgba(0,0,0,.4);
}
#dropdown_classe .wrapper:hover .content {
height: 253px;
z-index: 3;
-webkit-transition-delay: 0s;
}
#dropdown_classe .content:hover {
height: 253px;
z-index: 3;
-webkit-transition-delay: 0s;
}
#dropdown_classe .content ul {
background: #fff;
margin: 0;
padding: 0;
overflow: hidden;
height: 100%;
border-bottom-left-radius: 5px;
border-bottom-right-radius: 5px;
}
#dropdown_classe .content ul a {
text-decoration: none;
}
#dropdown_classe .content li:hover {
background: #eee;
color: #333;
}
#dropdown_classe .content li {
list-style: none;
text-align: left;
color: #888;
font-size: 13px;
line-height: 30px;
height: 30px;
padding-left: 10px;
border-top: 1px solid #ccc;
}
#dropdown_classe .content li:last-of-type {
border-bottom-left-radius: 5px;
border-bottom-right-radius: 5px;
}
If you have any advice please let me know
Ctbs1

Answer 1

I fixed this issue with this :
<meta http-equiv="X-UA-Compatible" content="IE=edge">