Missing Site Icon in SERPs

Has anyone experienced the sudden loss of their website icon in the Google search results? One of my clients’ sites has suddenly reverted to a default grey globe icon. My developer is stumped. Nothing changed on the website and I can still see the icon image linked. It’s an Oxygen/Wordpress site. The icon is missing in all browsers/for all pages indexed. I’ve also noticed that the site title has changed to a much shorter version of our title for every page I’ve checked. It used to be 65 characters for the home page and it has been reduced to 15. Video watch pages are reduced to just the company name (3 characters). I’m assuming it’s Google doing this since we haven’t edited the favicon or site title. But it has stripped all branding and the company name from the results and that hasn’t happened to competitor sites so it stands out and not in a good way. Is there anything I can do to restore either or both?