This was me lol - I had been on asking about replacement parts for my Imperial Shuttle that had cracked. I just happened to ask out of curiosity to what they would say. I find it very suspicious as I wouldn't expect LEGO customer service representatives to have any knowledge on sets that haven't been publicly announced or not on LEGO.com - don’t take this as confirmed - that’s not my intention, in fact there is nobody who disregards rumours and leaks more than I do. I miss the excitement of seeing sets for the first time through public release or in store visits. Could be a human error, I just thought it was weird they didn’t refute the set number invalid.
Read it, and make whatever you want from it. One line that did make me raise an eyebrow, was then I asked if they had a release date for it, they replied:
Of course this could have been a painfully long and poorly worded way of saying we don't know anything about that set number, I just found it strange they didn't initially say to me first question they were unaware of any set with that number or name.