Default Need the help of a developer

Hi,
As the title suggests I ask advice from a developer about Miui Rom.
Indeed, the official French version, I have fc of a messaging app from the reboot of the phone.
I have the latest version 2.7.1.1 TRWP, I do all wipes, I flash and reboot before the settings for the phone, I have fc messaging.
I tried various things (manually set my APN, change Kernel, etc) but nothing doing. The only way is to download another app messages on Playstore and running smoothly.
Several of us have had this problem and have posted in the Miui France but not answered our request forum.
Being a fervant of XDA reader, I know there are excellent developer here and I have no doubt about their ability to solve this problem ...
Thank you for your help.