support for srcset not implimented

I think this has stopped working now with the new support for srcset.

I’m using the plugin … you can see it on http://www.nickysgaythailand.com/gay-blog/new-cultural-dates-in-bangkok-end-february-4/ which should have a blue header

I’ve manually adapted the headers to change for the most recent dozen posts or so, but if you look at the older posts, their headers are stuck on default. The “inspect with firebug” shows:

<img width=”900″ height=”180″ alt=”Nicky’s Gay Blog” sizes=”(max-width: 9999px) 100vw, 1920px” srcset=”http://www.nickysgaythailand.com/gay-blog/wp-content/uploads/2012/08/bannerng1206blog2-300×60.jpg 300w, http://www.nickysgaythailand.com/gay-blog/wp-content/uploads/2012/08/bannerng1206blog2-768×154.jpg 768w, http://www.nickysgaythailand.com/gay-blog/wp-content/uploads/2012/08/bannerng1206blog2-383×77.jpg 383w, http://www.nickysgaythailand.com/gay-blog/wp-content/uploads/2012/08/bannerng1206blog2.jpg 900w” src=”//www.nickysgaythailand.com/gay-blog/wp-content/uploads/2012/07/bannerng1206ngbblog.jpg”>

The final file – bannerng1206ngbblog.jpg is the only correct one.

Please advise

https://wordpress.org/plugins/wp-display-header/