Not a common problem here in the Gallup NM Ford dealer. And this is the four corners reservation area, pickup & SUV country for sure.
You can NOT stereotype all Explorer front ends as trouble. I have fleet customers with dozens of Explorers each with 300k + miles on them.
My sales history of 4L2Z-1104-AA hub/bearing shows 8 all last year with 4 showing so far this year.