ssprengel wrote:
I haven’t had a chance to confirm either possible bug, yet.
Nor I. But I have confirmed that DNG conversion has, in the past, preserved settings..
That said, I am starting to wonder why the OP prefixed the phrase with the word "custom".
In other words, DNG converter should preserve pre-existing ACR settings (as they exist in xmp), but won't necessarily apply Lr defaults.., and as we all know, will NOT preserve any camera settings (except as generic metadata - not as develop settings I mean).