What do you mean? Only unconquered regions changed allegiance. I'm not trying to dictate Phantaria's actions here, they can act as they think best.
If a region changes allegiance while a TO is 95% complete, does the conquering realm need to start again at 0%? If that is the case, then I agree with you that it is less than ideal. A TO should go through at that point.
Honestly I don't even know whether Saffalore was being TOed when it switched.
Actually it doesn't go to 0%, but instead becomes impossible because TO can only be performed on regions of realms you are at war with. Technically the TO is still ongoing, but it is mechanically impossible to perform the TO actions, or at least that's what I'm getting from the Tara/Coria merging case.
