Well, I came across a bug. When I try to rename a character in the legacy and press the backspace key the game crashes. I was been able to reproduce it with 100% accuracy
Ah, we are tracking that one. I believe we will be turning off customization from that screen temporarily - you can still customize once you recruit them, and should stick if you promote them with the new name. We'll turn it back on when we have a chance to do a proper fix. Thanks for the report!