Example: https://www.daniweb.com/programming/web-development/threads/518292/problem-in-php-showing-undefined-index-and-not-inserted-in-my-datasbase
Click on one image and I get two tabs with the same image on both tabs.

That's odd.

My android shows one new tab but states a pop-up window is blocked.

Yes I forgot to note host details. Windows 10, Firefox shows this behavior. Opera and Chrome just fine with a single image in a tab.

Thanks alan. I know details like this matters.

This is fixed, but it might take 24 hours for browser caches to clear before it goes itno effect. Or, you can clear your browser cache to force the update.