Diablo III possible Nagelring update?

It’s going to sound silly but I am a big fan of the Nagelring, I have lots of fun using it but a question came in my mind while looking throughout the history. I’m incredibly late (like ten years late) to this but I found out during the PTR when the Nagelring got the update, apparently it spawned a lot more Lunatics than just four and it really got me thinking, why did they decrease it to four? I get maybe it has to do something with the programs or frames but I don’t know, I’m merely a consumer. Again, it’s incredibly late and I doubt it will ever happen but it would so amazing if the Nagelring can spawn a lot bunch of lunatics. Or at the very least make it more than four.
BTW If anyone knows, when players could spawn a lot of lunatics during the PTR, was it just a bug or something that was initially introduced but then later changed?