When I reloaded a saved game after a crash due to Alt-Tab I got my sovereign at the same level and with the same items as before but the other things were not correct:

- The cities had disappeared except for their borders

- Items were still equipped but could not be reequipped after unequipping

- Research state was back to starting state

Unrelated to the above issue but I could not install Elemental from within Impulse as normal but instead had to run Impulse as admin. Without that the admin request still appeared on installation but it failed at some point with an XML error, that it could not find the file list.