Maguire has a very hefty PR team behind him and when they want info released, it's done en masse making it very clear it's from Maguire's camp. It is never info dropped from a solitary Twitter account of little to no repute.
This is someone trying to drum up negativity towards the player, perhaps in a bid to hasten the transfer (from their perspective) or to get clicks themselves.
Even if they had a scoop, it wouldn't take this long for other media sources to piggyback and release their own info.