I just noticed that ajax onchange event on blob(and maybe others too) fields doesn't work correctly with jQuery 2.x. It makes an ajax request and the browser even recieves responce which seems to be correct but nothing happens in the browser: content is not refreshed and there's no any error which is the most surprising.
It's easy to proove this: download CropImageUnitSample project from the store, generate it and then replace jquery.min.js with the latest jquery 2.x concatenated with the latest jquery migrate plugin. You'll see that it doesn't work as it should.
As a solution for now i use jquery 1.11.0 for all browsers instead of 2.1.0.
Please update wr.js code to support the latest jQuery and include in the next update or just post updated wr.js somewhere.