Thanks for the quick reply concolor1
if you need, I can provide more details in order to address this weird bug as I have played thru 2 times but both cannot be completed.
I was running Origin version, no disk.
1st run: captured south base, established defenses, destroyed 5 silos, wiped out entire Soviet forces, secure Einstein, eliminated ally forces, mind control Einstein and move him to escape point, no objective complete notice, then destroyed all silos, mission still not completed.
2nd run: captured south base, didn’t destroy any silo, destroyed north con yard, war factory and barracks, secure Einstein, eliminated ally forces, mind control Einstein and bring him to the escape point, still didn’t get the objective completed notice, didn’t continue from that point.
additional notice, during both runs, some of the saved game cannot be loaded especially the saves before secure Einstein.
hopefully those info can help or I can do more runs with different combinations.