Ah yes.......wiping out lobes on a solid lifter camshaft. Know the problem well! My experience has been having it occur on initial start-up, right after a rebuild or new cam installation. Seems like if you can get past the first 10 minutes, you’re in the clear.
Hemmings posted an article a little ways back. Seems that they attribute the problem to the way that motor oil is now formulated. Supposedly, it’s different then “back in the day”. Of course, Hemmings is now selling their own motor oil, so take that into consideration.