Did they explain why Brooke's partner had left at the beginning? I know he posted a video saying it was due to personal circumstances but the lack of addressing it makes it seem very strange. However I do remember Robert now he is great
I apologise profusely to him if this is not the case but I have a feeling he was fired if the show didn't mention him. None of the other cast members or pros have commented on his post either which is also a sign. TBH, when they say "personal reasons", I do get suspect. A similar situation happened once on the French version years ago and it turned out that the pro's girlfriend was jealous.
Especially since Maurizio was so excited to dance with Brooke in those first few weeks, I don't believe he'd go of his own accord for the rest of the series unless something really serious has happened.