Tried version 1.13 and it works better but it softlocked when it tried to give me another girl after my party was at a full 4. It would not let me close the reward screen and so I could not keep playing and finish my run to see if I could get gold for buying things in the main menu.
Also as a side note it would be nice if we could see whatever girl was giving birth when receiving a new girl so it would be easier to see them at full size since you can quite easily miss seeing it while trying to survive against the waves.