Didn't you get an invite to the Congo Conference?
Nope. It might be because I was at war with the UK at the time.
Oops, I see you already HAD the provinces! Not seen that before... Usually the Congo forms before life rating allows people's colonisation to get there
That's the other weird thing about this particular game. I had a 12 year head start for colonizing Africa. I got the techs as soon as was allowed and began colonizing in 1871. Nobody else even started until 1883.
I was playing as Germany and the same thing happened to me. So, I loaded my closest save and continued from there, saving often, delaying the decision over and over somehow, until the whole thing just didn't make a decision and I got to keep my Congo.
I thought about doing something like that, but I wasn't aware that the Congo Conference could NOT make a decision. I just figured it was a matter of losing it now or losing it later.
They should definitely make it so that the Congo event chain won't fire unless the whole thing is unowned. Now instead of one big chunk of Africa, I have two smaller chunks with a Congo in the middle. I'm going to re-direct my colonization efforts so that my two chunks meet up on the other side and make one (admittedly bizarre shaped) piece again.