no mobile data after reboot - have to enable/disable flight mode - Xiaomi Mi A2 Lite Questions & Answers

Hi everybody,
Since I upgraded my phone to Android 9.0 Pie, I have a strange problem after every reboot: Mobile data is enabled but doesn't work (no network indicator arrows visible) - it will only work after I enable/disable flight mode.
Can anybody confirm this issue or has a solution? Is it a Pie bug?
My idea was to use Tasker to enable/disable flight mode after reboot...
Thanks in advance for your help!

I have this problem even i use oreo 8.1 and now on android pie i have same problem.

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