It seems (and this is worst) that if you are preparing a long rest with characters into the "void dresser", they will not follow you when you will leave the camp the day after ...
Notice also that they are not receiving the benefit of the long rest (no spell or health recovery).
Will give the information to Larian but REALLY HOPE it will be fixed within the next patch. I have no pleasure to restart hours of game just because of a function not working.