[AA] Imaginary Friend Vanishes when making real (Space issue)

So I have been trying to get my sims to turn their imaginary friends into a real sim and I have had some luck. I have noticed that when I age my child sim up without using a cake to age them up, is when it doesn't work. I have used a cake to age up a child sim twice now and it worked to turn their imaginary friend into a real sim. Sometimes it doesn't work that way but most of the time it does. I have tried with mods on and mods off, both times it works sometimes and then doesn't work sometimes. I don't know if when a sim ages up from a child to a teen, if that could be the problem why imaginary friends turn into a real sim or not. I have also been checking for any last exceptions to pop up but the only ones that do is when I have mods on. I have checked in a new save game and the imaginary friends turn real sometimes and don't sometimes and same thing happens when I checked in an old save game as well.