Steps to reproduce
Click to show search.
Search input displays and stays on the screen.
Search input disappears due to input already being active.
I can also replicate in the Luma theme (using a mobile).
As a quick workaround without editing core files I used this jQuery (with require.js), this stops the previous toggle from firing then we toggle the active class.
require(['jquery'], function($) {
var searchLabel = $('#search_mini_form .label');
searchLabel.on('click', function(event) {
event.preventDefault();
searchLabel.toggleClass('active');
});
});
Thank you Ben, I thought I was being a bit lame reporting such a small issue... but it really counts - especially on a serious release.
Here a small video to see the error https://drive.google.com/file/d/0B3kBFTm6f_Kab09EemZRZmg1X0U/view?usp=sharing
@daim2k5 That seems a bit different to the issue I'm having, here is a gif of the problem on Luma mobile. When I click on the search icon the search bar opens then immediately closes, this is on a demo store using the Luma theme (no customisations). I can also replicate on a local environment which uses a custom theme and Luma as a parent.

@xAvarice Which is the issue you're having? If mine is different I will create a new ticket for it.
@BenSpace48 I'm having that exact same issue as you. Thank you for the gif. I don't see any problem at all with Daim's video - I figure compared to this issue I don't have to look closely to compare.
Internal issue MAGETWO-53263
@BenSpace48 @xAvarice looks like i had a different bug, thanks for the gif
Closing the issue, fix has been delivered to develop branch.