Heathen Chief made believer halfway through game??

I hopped on Virtual Villagers 5 as usual to check on my villagers when i got the random event where a heathen approaches the villagers wanting to join them, turns out when i accepted them it actually converted the Heathen Chief, so is it just me or has this happened to others before?

I've never seen that myself, but there's been a couple of posts here talking about that!
I thought they already fixed that bug? Lol.