It was working well in 4.10 but now it doesn’t.
I bind events:
InputComponent->BindKey(EKeys::LeftMouseButton, IE_Pressed, this, &ABalanceSpectatorPawn::MouseDown);
InputComponent->BindKey(EKeys::LeftMouseButton, IE_Released, this, &ABalanceSpectatorPawn::MouseUp);
InputComponent->BindAxisKey(FKey(FName("MouseX")), this, &ABalanceSpectatorPawn::RotateHorizontal);
InputComponent->BindAxisKey(FKey(FName("MouseY")), this, &ABalanceSpectatorPawn::RotateVertical);
and after I pressed LeftMouseButton I receve 0.0f on MouseX and MouseY.