Playing as the Baron's Alliance I conquered the totality of England (set London as my capital), the Scottish Lowlands, Dublin and a couple of regions in Northern Ireland. There are only two English strongholds left in western Ireland. Then, an event popped up saying if I would like to continue with my claim to the English throne. Well, I said yes and then another event appeared saying that I had failed to achieve the victory conditions and that my faction had been defeated. I looked down to the map and all my regions belonged now to the English and I was kicked out to the main menu. Is it a bug or is it just how the BA's game ends?