This honestly does not come as a surprise to me. I wonder what her reservations are?
Is she being denied her choice of producers for her own songs? Or is she demanding the entire album be produced by her choice of producer? The latter could be tricky, given how Lindsey & Christine's songs are apparently finished.
Or is Stevie not liking what she's heard from Lindsey & Christine's sessions? Maybe she's demanding a reboot?
Perhaps she's pulling a Lindsey- demanding time for her solo career after these consecutive Mac tours?