I have had the same issues with an apron plane and a LVBUJ. I even contacted LV and they suggested a 30 degree bevel which did help but still have issues with the edge chipping. I experienced chipping in cherry, alder, and poplar. Surprisingly alder was the worse! Haven't figured out why because Alder is relatively soft. I ended up selling the apron plane because my A2 blade did the same thing as the PM-11. I use my LVBUJ for roughing work so I don't care if the edge chips.
I have had had the best luck with LN A2 blades. Not sure why but I do!