joined:July 3, 2015
I don't seem to be losing traffic, but week by week I've been losing indexed pages (in search console) since mobile-first was activated for the site.
I have very few mobile usability issues.
I see a ton of pages under "Crawled - currently not indexed"
Not sure if this is just a process that everyone is going through, the site is being re-indexed, or something else is wrong.