First few frames are dark

Unity Engine
1

I have scene with Realtime GI enabled. It works nice in the Editor, but once I run it as a separated game build then a few first frames are dark. It is a big problem for me because I use realtime reflection probes that are rendered in Awake, and therefore they are wrong too.

Why it happens and how to solve it?

Unity 5.3

2

The realtime gi needs some frames do do the calculation for the lighting.
A option would be to trigger the rendering of the reflection probes manually once the gi is done rendering.
Not sure why it different between editor and the build version.