Created attachment 255303 [details] Animated GIF of the problem Steps: 1. Open http://n12v.com/css-transition-to-from-auto/ 2. Open the console 3. Switch frames several times There are no errors happening. It looks like the select doesn't even receive the click event.
<rdar://problem/21475856>
We should figure out if this is a regression in WebCore forms or in our code. I don't think we have changed anything here recently.
It’s like this for at least 3 months. It’s hard to bisect since the problem doesn't happen very often.
I have been unable to reproduce this for over a year.