Hi,
There is a bug with a Blank Data Screen. After a few rides I've discovered what cause that extra Blank Data Screen. The BDS appears only when MTB Jumps data screen is turned off completely (It's not about an option like "Show Screen" in MTB Jumps options) When I turn on/add a new screen which is an MTB Jumps screen the Blank Data Screen turns into MTB Jumps screen.