Found this suspicious looking storm in Russia, is it just a radar glitch?

EDIT: The app is MyRadar, sorry for the error

Low level radar interference. Common in radar detection and systems. Especially low level doppler radar etc which is used in weather often. I was told by a radar technician this happens when they need to be recalibrated the radar picks up ground and other interferences. Don’t know for certain, seen it before though on many local radars especially during rain.