A lot of people are with the opinion that it is the release of Shortname feature that is causing Google My Business suspension. A lot of people tweeted the same. Here are a couple of screenshots. 

Shortnames causing Google my business suspension
Mike friedman

However, the suspension issue started around June 12th and the Shortname feature was released around June 20th. So, there might be a possibility that the two are not related. Moreover, Google confirmed on 24th June that Google My Business Team is suffering from a backlog. 

Google My Business Backlog

People out of fear are removing their shortnames. It needs to be noted that Google has made no official announcement regarding the same.