This is in response to another ticket Not mobile friendly after updating that was not answered in time and you closed it.
You said the site was suddenly not mobile friendly anymore, according to Google, because the site was slow. That is not the problem, The issues is caused by Envira Gallery. I tried multiple settings for both the page and the plugin but no matter what I try the page is never mobile friendly anymore if it has a gallery in it. Not even if it only has a couple of images. It has nothing to do with the server speed, the images are optimized and are not large file sizes.
What has to be done to get this gallery mobile friendly again, as it was before the last updates? I have spent countless hours trying to figure this out.
Also see my private message regarding that prior post.