I'll keep this short and sweet since the header already explains this blog post, mostly.
The general advisory is:
If you want to upgrade to MIUI 13 or flash anything based on it, don't do it for the time being, at least until Xiaomi gives a clear clarification about this issue.
Unless of course, you like having a non-functioning device, then feel free to wander on.
The hentaiOS/helluvaOS advisory is:
Don't jump ship from hentaiOS/helluvaOS to MIUI 13 and if you insist, don't @ us. You have been warned. If you get a hard-brick, don't blame us, we aren't MIUI Developers in disguise nor have we infiltrated MIUI HQ and pushed a button that made your device bricked. It's all on you if you flash MIUI 13.
Moreover, to further clarify the rumors that we're the cause of these hard-bricked phones, well, if you consider the fact that people who upgraded from MIUI 12.5 to MIUI 13, people who reported their devices were hard-bricked during normal use, and users who reported this have always stayed on stock firmware and still got hard-bricked devices, because "people who are trying to get away from hentaiOS". I guess we should congratulate ourselves and wait for Xiaomi to acquire our project as MIUI base.