Oh boy, oh boy.
Let me try to give you a quick rundown as best I can.
First of all, Bonbi returned to making content on December 24th of last year, and took another break in late June-early July, and most recently in early November.

Now, the drama. I wasn't really around for most of it, and I really just try to parse what I saw as accurately as possible.
Around the time Bonbi left, a guy called Anon1725/myspeld/Seth (nicknamed anonce because he is a pedophile) made a Bonbibonkers *** server against her explicit wishes. That same guy also apparently made an effort to get in contact with her then boyfriend Deepsauce. It seems like Seth schemed months ahead of time to get closer to Bonbi. Deepsauce himself is a 20 year old from Vietnam (remember that Bonbi was 15 at the time), but most people that interacted with him seem to think that he is cool and had nothing but good intentions. I can't really comment on that.
The important part is that since Bonbi and Deep lived in different timezones and Bon was quite anxious about all the doxing, she was looking for somebody to come to with her worries. Deep himself directed her towards Seth, who shamelessly abused the situation. He slowly but surely turned Bonbi against Deepsauce until she called him a pedophile (Seth himself being only a year younger btw) and accused Deep of all sorts of things that are complete lies (e.g. when he sent her a naked baby picture of himself, she called that a dick pic; or when he said something about her hamster, she claimed he wanted to fuck the hamster...)