Beware indeed. My May flights have started to be credited, but using FB rules, and not giving the FD bonuses that were in operation then. So, getting only 100% PE bonus, not 125%.
But, of course, their 'generosity' doesn't extend to giving the FB 750 miles minimum on short flights - only 500. Heaven knows how many calls it'll take to get them to correct this very simple bug in the system.