You should read some post here in the forum before bricking definitly your phone.
Miflash -> 1st topic in the forum.
Recovery -> power+vol up. Once you see the logo, release power button while holding vol up.
I guess this bug comes only from rom because it doesn't exit on V4 rom. Of course we could go back on V4, but if it's the only solution I prefer change my phone.
Hope Xiaomi will invetigate on that problem.
the problem is still present every week and I'm starting to be bored of it.
Does someone has an idea to solve that problem ?
Is it possible to adapt V4 kernel or other part of his code on V5 rom (sorry if I say stupidities) ?
Thanks in advance.