Lost settings and layout on 3.8.23 on a ZTE v987

[Codeman]

Hello,

I have a ZTE v987 with Miui 3.8.23. I already experienced 2 times an annoying behaviour : after a reboot, I lost most settings (like, email accounts) and I lost the layout I created (icons in folders), all the icons were placed outsite folders.

Did anybody experienced this before ? What can be a possible cause ?

Thanks !