Name generator "fixates" on just one last name list

I’ve noticed while playing around with the name generator in 3.0 that no matter how many of the last name lists you have selected, it only draws from one of them instead of the expected behavior of taking a random sampling from all selected last name lists… It seems to prefer the Japanese list over the others if all are selected, and when Japanese is unselected, it goes to the British/London lists, then Spanish, then Polish, then Finnish, etc.

I am only generating 50 names at a time, and I’ve noticed that if I bump that number up to something higher, then after it gives me roughly 80 Japanese surnames, it will move to another list of names. Anyways, some step in the process clearly isn’t being randomized like one would expect, or how it worked in version 1 to my recollection.