first theory posted here,... be nice... (maybe turtle shell book spoilers?)
Alright my original theory was that fossil/ scientists may have had something to do with the parasite infestation. Right now we know that the machines started failing because of the fact that an update caused them to fail. And we know fossil before the outbreak was working on something to remove spawning defects from people that spawn, the reason i believe fossil might have had something to do with the failure is because in earlier episodes and the note book from the shell guy, we learn that they used to work in the paradise region, we learn that they “ have recently completed the collection of remnants from the old gemstone hive, intended for analysis by the chief scientists at Reaching Gardens.” We also learn that fossil is in charge of INTEGRATING the remnants from the hive into the spawners, to help defects. im GUESSING that the “citizens” of the hive looked like this (img 1-2) Comparing these to the current infected citizens of the rings, they have similarities in some aspects an example would be the insect limbs, i think this leads to fossil having a part in the failure of the machines because of the fact that she was in charge of integrating gemstone hive remnants into the machines, and some other supporting evidence would be in episode 5, fossil messaged pk to come over, telling them to “forget friday you need to come tonight” and later in the episode fossil later scans pk to see if they are infected or not i think this shows fossil already knew of the impending failure of the machines, and we also know the two have been already talking for a year at most, showing that fossil has become a friend, and they care for pk. So when they eventually figured out that the failure was coming, they told pk to come over friday, but misjudged it, eventually leading them to tell pk to “come tonight” and we know that the infection only started to really show up later in the day. Showing even more how fossil knew about it before it happened. (img 3-4)
