Because it's just not an issue with Chrysler stuff. I've said this before but IQ and I have had the same experience, as I assume RAMM, Porter and everyone else who builds engines for a living found.
The hydraulic internals are not capable of dealing with the aggressive ramps of the roller lobe.
I started refusing to build anything with hydraulic roller lifters. They either used solids on a hydraulic roller cam, went with a SFT or went to a different builder.
Quite frankly, I was tired of fighting that junk, and listening to the customer ***** his face off after being told they will make noise and you'll hate it, and they ignore you and you build it anyway.
Then they go ballistic when it's noisey and then ***** because I was right and they didn't listen.
I've fired plenty of "customers".