Indeed I did.
Facebook is seeing your domain as throwing a 503 response code... that means service unavailable. Upon debugger refresh it's now a 206 response code which is 206 Partial Content...
I HIGHLY doubt that's a plugin issue. First off... Facebook is ALWAYS buggy... and I mean ALWAYS... making this plugin and doing FB apps for a while has made me understand that. Also they're always working on the debugger and I constantly have issues with it.
That said.. most of the support issues I've had emailed to me are because Facebook is really good at breaking shit.
The plugin is fine and wouldn't be messing with your site response codes - I'd say give it time and make sure your DNS and server are all stable and just keep refreshing the debugger. If it shares okay then you're good.