
So it seems this special property of twins is actually only on some platforms, and that transferring and opening a save on a platform that doesn't support it severs the links of all existing twins. New twins made in the same vault though were linked. Training them independently back to the exact same stats didn't "repair" the link either. Training stats that were still the same didn't train both. Their stats didn't change to resynch or anything, and their link was also severed. After giving them some independent stats, I moved the vault back to my PC and loaded it again on Steam. When loading that vault on Android the twins stopped gaining stats together, though the game didn't take away the stats that were previously trained before loading on Android. I also tried moving my vault from Steam where twins were in training rooms and had already trained some stats together. So it's worked in both a long-existing vault on Steam, and a brand new one where I used a save editor and time manipulation.

I did the exact same procedure above on Steam instead, and it worked there right away. Interestingly, I couldn't get this to work on Android at all. Upgrading the training rooms, then merging training rooms.Spending Quantums on either to see if stats go up, then moving system time to see if stats go up.Building 1-wide, level 1 strength and luck training rooms, and throwing a twin into each.Moving system time ahead another 3 hours.Waiting till they breed, then moving my system time forward 3 hours.

