Welp, Android's guide says that the event on relationship level 20 no longer exists, and that android would immediately level up to level 21, but that doesn't seem to be the case in my save, she's still level 20..
You may have stopped playing in a previous version while Android was at these levels. In that case, you may be experiencing an uncommon bug. The fastest way to solve this issue is to reload to a save when Android was at a lower relationship level.
