This is, I think, a different bug from the early access one where Lae'zel was in the party but just stood there.
The release verision bug sounsds like she won't actually join the party at all, as per the report at
https://forums.larian.com/ubbthreads.php?ubb=showflat&Number=874759#Post874759.Locking this thread, as I don't think it's the same issue and it's probably best to discuss release version bugs separately.
