Here's what happened:
I'm playing BG2EE with an un-jailbreaked iPad 2
I Installed SCS (that's why I'm not sure it's a real bug).
I created a multiplayer game.
I created 5 PC (just one imported from BGEE).
I moved the savegame from the MSAVE to the SAVE directory.
I started to play and at a certain point one of the PC (not the main character) casted "find familiar".
I was surprised to see that the spell worked.... until I tried to speak to the familiar.
The sorcerer that summoned the familiar couldn't speak to him, only the main character (a fighter-thief) could, and the familiar is acting as if summoned by the F/T (even the bonus hp were given to the F/T).
I did many strange tings, as you can read above, so I'm not sure it's a real issue. But maybe someone can confirm that this is indeed a bug, trying to replicate this with an unmodded game.