Perhaps the blade is not properly hardened? A good blacksmith could fix that.a few of my thoughts.
Older wood gets harder.
You could have silica in the wood (possibility) depending on where it was.
lower angles usually roll an edge over faster, since they are sharper. Higher angles 50 degree York are less prone to rolling over, since there is more support to the edge. I work a lot of maple, and it's an awful hard wood to plane due to the change in grain direction, and it's tearout. I go high angle and across the grain. I take as fine a cut as I can, and close the throat up as much as possible to prevent it from lifting chunks.
Still looking to master it. I work a lot of tiger maple, The guy I buy from has a stroke sander because of how difficult it is to plane.