Multiple users are experiencing screen jumps on mobile devices when using AdSense responsive ads, specifically with the “insert an ad every nth post” option activated. Cazadividendos and Paracelsus report the issue on iPhone, while Paracelsus also experiences it on Android.
neil suspects the issue might be related to the ad platform and size. Cazadividendos confirms using AdSense with responsive ad sizes. Paracelsus offers to reactivate the problematic option so neil can investigate.
neil tries to summarize the issue and provides a potential solution by adding CSS dimensions to the ad container. However, AdSense’s JavaScript overrides these styles, making it difficult to fix the issue. neil proposes four options to address the problem:
The topic will be continued in another discussion: https://meta.discourse.org/t/adsense-responsive-ads/63991/39.
Our users are complaining about screen jumps when loading a topic on iphone. It seems very similar to this problem solved in july:
We use:
It is a small forum with 800 users and these metrics:
We installed the Digital Ocean Metrics Agent to get more information.
Could it be a performance issue? Should we have to increase RAM?
Thanks in advance.
My take: it is not a performance issue and whatever was fixed in July was not enough since it still occurs on mobile (the jumpiness) and only if the option to insert an ad every nth post is activated.
It was so annoying and disturbing to our users that we’ve had to just remove that option.
Is ad insertion every N posts causing variable size posts on mobile @neil?
I thought @eviltrout figured it out and it was fixed. @Cazadividendos @Paracelsus Which ad platform? Which ad size? You’re saying that the jumpiness is only on mobile?
The problem only was reported on iphone. In android it works as expected, without jumps.
Ad Platform: Adsense
Ad Size: responsive size (both por general and mobile ads)
Adsense nth post code: 5
I have (had) exactly the same settings of Cazadividendos except for the ads being every 10th post and both Android and IPhone users reporting the same behavior (specially on mobile Chrome).
Actually, I suspect the same thing happened in desktop version, but since there’s so much more vertical area you can still find it visually without having to re-scroll the whole time.
If you wish I can activate it and you can see for yourself, would that help @neil?
Ok, so I’ve reactivated the option and the jumpiness is back. 
If you scroll slowly between posts 684 and 686 (and stop scrolling here and there as if you were reading each post), you’ll see what we mean…
I’ll try to summarize what’s happening here… 
I posted about this in another topic here, so please read:
Digging deeper, I tried using CSS to add dimensions to the container where responsive ads should be rendered in between ad posts. One example:
.adsense-post-bottom.adsense-responsive {
height: 100px; // no taller than this pretty please
}
But… this happens:
I can’t find anything in the ad plugin or in core discourse that is adding these inline !IMPORTANT styles, so it looks like the adsense js has chosen the nuclear option and really wants to impose arbitrary heights on the container. So auto !important everything!
So it looks like AdSense has made it impossible. Options now are:
EDIT:
Maybe I understand this suggestion now:
So you’d need to be able to select “responsive” and then set the max width and max height in the plugin settings.
Closing this topic and will continue in this one:
