New APN profile BUG

New APN profile BUG
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Bug description: Can’t add new APN profile.
Affected version:
Steps to replicate: Settings/ Mobile networks/ Access Points Names/ New APN.
In new Rom Version my Internet Mobile Data and Receiving MMS messages don’t work on default APN configuration. When I add manualy APN configuration and try to save it nothing hapen. Settings are not saved.
Device: Xiaomi Redmi Note 4 (Qualcomm)