After a quest with thieves guild, my group disappeared. i went to the bath house to get them back.  however Sandra is no longer in the group. i think this is a bug, and Sandra is even blackout in cg room. now, there is a quest that asks for someone who can pick a lock , i assume it would be Sandra, so i am stuck on that quest. i went back to the dungeon where Sandra was found in the first place, but she is not there. what shoul i do?( also i  play on Android. ) thank you for reading.