The VPN did not protect me from another 90k, sadly. However, it did provide useful information: that at the moment of disconnect, there was congestion that caused a sudden severe spike in packet loss. Something that may not interfere with something that buffers like YouTube, but would
definitely impede something as sensitive as FF14. I have passed everything I have collected and done along to a CS agent with Xfinity. And... to my great shock, I found someone who not only read and analyzed, but acknowledged that I had already done everything they would have asked of me and more, and are now submitting a complaint on my behalf to the higher level teams.
Is that going to work? ... I don't know. But they've reassured me that they can tell there are no issues in my personal network or immediate vicinity, and are going to do what they can. Best believe I gave that CS staff a good review. Even if they end up unable to fix it, I'm simply overjoyed to get a human response.
In the meantime, I'll keep playing, keep enjoying the game as I can, and keep an eye out to see if things improve. That said, if by some chance someone in the future does stumble upon this thread having similar issues: I would recommend looking into the things the SE support email out, try their fixes, try the steps I have on
this page and the
last, before crying out to the ISP.
90k, especially 90002, is a generic disconnect error. It does not have only one solution. Therefore, even though this one ended up getting pushed to ISP level, one of the fixes I've tried
might work for you.