[Plugin: WP to Twitter] Author-specific twitter handles keep getting dropped

I’m using the latest version of the plugin and I’m running into an annoying problem where the author’s twitter handles keep getting left out. When I check the user profile, the twitter handle is gone, along with the radio button selection to tweet the posts.

Is this a known issue? My authors have to keep setting and resetting their Twitter handles on their profile pages.

https://www.ads-software.com/extend/plugins/wp-to-twitter/