Pseudo-Element Transition Webkit Bug

dabblet.css

/* 
Pseudo-Element Transition Webkit Bug
*/

a {
	transition: 500ms;
	position: relative;
	border: 0 none;
	border-radius: 5px;
	padding: 10px 20px;
	font: 16px/1 sans-serif;
	line-height: 1em;
	color: #fff;
	background: #f26;
}
a:hover {
	background: #dd0;
}
a:after {
	position: absolute;
	left: 50%;
	margin-left: -10px;
	bottom: -10px;
	content: '';
	border-style: solid;
	border-width: 10px 10px 0 10px;
	border-color: #f26 transparent;
	display: block;
	transition: 500ms;
}
a:hover:after {
	border-color: #dd0 transparent;
}

body {
	padding: 30px;
}

dabblet.html

<a>Button with pseudo</a>

settings.json

{"view":"split-vertical","fontsize":"110","seethrough":"","prefixfree":"1","page":"all"}