Mopar Joe's 440 was built about a year ago. He bought the cam kit and the machine shop warned him there will probably be issues. They apparently had issues with other Comp lifters. Some of the new stuff isn't as good as the parts built a decade ago. I sold Comp back in the late 70's as well as TRW with no issues.
Good info, IMHO. Yes, I've been putting in hydraulics for over 40 years in various motors and this issue starting showing up less than 10 years ago for me. Thinner oils seem to make he problem worse (or more apparent) too.