As a low floc yeast, I would think it won't matter a whole lot (if you rack and crash, you will be dropping a lot of yeast out of suspension, anyway, so the beer may still be on a reasonably significant amount of yeast cake). My thinking is that the beer is in contact with only the top portion of a yeast cake, anyway. But, I could be convinced otherwise!
I have kept mixed fermentation Belgian beers on yeast cake for a whole lot longer than what you are proposing, without apparent ill effect. My solera Flanders Red is perennially on some amount of lees.