Strike team achievements

Still not working 2021. Do not use the phone app. I'm certain this is what caused my achievement to never pop. I have played ME:A on the Playstation 4 & didn't encounter this problem but I didn't use the app back then. I didn't realize that the app was causing problems when I initially started for the trophy. I have a couple strike teams that I started strictly in game waiting to get them to level 20. I have completed every other trophy, including playing on insanity. I'll keep logging in just to get my last two teams to level 20 & cross my fingers. I'm playing on PC through Origin. ****Trophy finally popped after getting a team to 20 & then using the trick others in this thread suggested.