I’ve encountered an issue with importing saves from the original BL into the remaster: my Mordy’s precious Bessie didn’t transfer over. (And yes it’s a legit weapon, not some hackery nonsense.) I tried re-importing a couple times but it still didn’t make it over.
One of my Liliths has a Jackal that made it over OK, so it’s not necessarily a thing with pearls.
Don’t delete those old saves from the original just yet!