can you post a link to the picture in question? The IAP-Radar at Andenes (MAARSY) has already detected mesospheric echoes for a week or so, and there have been echoes at OSWIN (Kühlungsborn, Germany) on May 19 (strong), May 20 (rather weak), and May 22 (rather weak). But there has been no visual sighting from Germany, yet.
Here you are , Stefank www.blipfoto.com/entry/3089722 . Looks authentic. I had negative visual obs from Yorkshires South Pennines between 21:30 UT & 22:30 UT . Clouded out by terrestrial clouds after a good start.