Default Unity icon when building for Facebook Gameroom

I've got strange bug. I trying to make Windows build for Facebook Gameroom with Unity. At the Player Settings I configure game icon. But when I build game, I see that the game executable file has standard Unity icon instead of mine. When I build for Windows standalone, executable icon is correct, but when I switch build platform to Facebook, I get this problem again. I tried to set default icon, and to override icon settings for Facebook. Nothing helped. Can reproduse this on Unity 5.6.0 and 2017.1.0. Anybody got same effect? Anybody has solved it? :)