What exactly happened with Ron and the roomies

So I’m watching S6 episode 19 and Ron is slithering his way back in and I slightly remember the episode where he (Ron) was taken out but did any of them ever say what it was that made them sever ties with him? Was it the thing with Saffire? Can anyone give me some insight here please because Ronnie said he messaged everyone in the group and no response then individually and no response. So can someone tell me what it was or if it was something specific? Please lemme know fam I appreciate it 🙂