1-even if it is not part of the rom, it is an application that depends on many xiaomi system services and applications that are inside the rom, and it is the application to control the entire xiaomi system, it is a xiaomi rom yours or am I wrong ?
2-I have no idea how to report this problem to xiaomi, do they have mail or technical support? I don't think so, but rather have the courtesy to take a look at the problem in order to help me and many others I've talked to who have the same problem on this rom of yours and on this phone in particular, what did it cost you? it could also be an incompatibility with the xiaomi.eu rom, it is not said that mihome is the problem since notifications work for most people in the world with all kind of phones and roms
3-having no way to write to you developers since you have no possibility of sending messages and the only one I sent it to hasn't even replied to me for months, remove the visibility of the problem by eliminating the threads where I ask for help from anyone who can, it's not this is not right either