Got a rather... odd bug (v0.82)? Been testing my issues with using multiple slots, and it seems like it might be character specific, rather than anything else.
Scenario; I'm redoing everything, currently on chapter 9 with everyone unlocked and TFed. Here's my results when selecting to send people on a mission:
Alice - dialog ends immediately after asking for another character
Phireina - after asking for next character, dialog displays realm info notice instead, then exits.
Joseline - dialog ends immediately after asking for another character.
Norn - dialog ends immediately after asking for another character.
Everyone Else - dialog asks to send another character on a mission, followed by asking to chose a character to send on a mission, then redirects to character selection dialog. So everyone else works correctly.