Actually only a Fix for only one case:
If you modify your primary species completly, the game doesn´t notice that and make it aliens at all with all problems of that.
More Genetic Engineering Mod fires an event in the background which changes the primary species of your country to the new modified but only if you modify your old primary species completly. the event fires at the moment, the modification project is fullfilled and only for exactly that new modified species. if some pops of the old species where born between the modification-project is ongoing, nothing will happens and the new born pops will stay as the last representatives of your primary species.
Also if you modify only parts of your primary species or some other species, nothing will happens.
Steam Workshop ID: 696389405 – Credit: mate0815