I had a blog that appeared in position 44 of Google for a keyword and a few days ago I made two changes:
1 - I changed the template for an older one that I have been using on other blogs.
2 - I insert a plugin "wordpress-seo-Yoast"
The blog simply disappeared from the google search with the keyword (but still appears by the url)
Yesterday I inserted a new blog (with the template and plugin referenced above) in a subdomain of a blog that was in position 6 (pag 1) of Google and he has vanished from searches.
I think it must be because the plugin because I do not see the template to do this effect, but I'm not sure.
Someone can give an opinion or has experienced something similar?