@Ignasi It looks like the issues regarding t3 alters not placing upon upgrade from t2 are still in the live game see report:
Temples disappear when you upgrade them
So perhaps turning Avatars back on when players can not reliably create a t3 alter so they can make a god-bubble is not the best idea … please take it to the development team as an urgent issue to discuss continuing keeping Avatar summoning OFF until they have patched out the despawning problems.