Problem white screen setting device on LG G2

aronne

Hello, I have a big problem with my LG G2 (LG-D802) with Android v4.4.2. and RaceChrono free v4.0.8
When I open the settings screen, and I want to set the GPS device bluethooth, appears all white, I can not do anything. GPS stock set to default, I want to set Qstarz GPS bluethooth but I have all the white screen.
RaceChrono v4.0.8 update installed but nothing changes.
Help me !!!

aol_of_RaceChrono

I'll email you, let's get it fixed