First of all, thank you so much for your prompt reply. You sure don’t see this often from plugin authors and I am impressed.
First a CLARIFICATION: I had previously told you that I created shortcodes in my Genesis functions.php file that I use to place the ads in the site. That was incorrect (that’s how my other sites work, but in this site’s case) for most cases — I instead used the plugin “AdSense In-Post Ads” for all ads with the exception of an ad on my home page where I just place the adsense code directly into a widget.
So, surprisingly to me are the following tests:
HTML checked (only): In the ad on the home page where the ad code is simply placed in a widget, it allocates space to the ad, but the ad never shows up, showing that tiny icon in the middle that means it can’t display the image Other ads served by placing shortcodes in-content (pages and posts) are fine.
Javascript checked (only): All ads show properly — horizontal and rectangle.
CSS checked (only): No ads at all show up, and no space is allocated to them, EXCEPT the one horizontal on the home page as described in the “HTML checked” note above.
* All ads are responsive if that matters
I would provide you the link to the site, but this particular site is one I don’t like to make public. I’d be happy to send the link to you privately. But I can’t have you look at it while the plugin is running with all checked because ihe site makes a lot of money and even if ads were not working for an hour it’s a significant hit.