Weird dual-sim issue - Huawei P20 Pro Questions & Answers

Hi,
My colleague bought a dual-sim P20 Pro (CLT-L29, android 9.1.0), which behaves just as strangely.
For the phone to work with both cards, they must be inserted in a specific way (picture attached).
Green - sim card works, red - emergency calls only.
We have tested the same cards and there is no such problem in my phone (oneplus 3t).
Both phones does not have a simlock.
Has anyone encountered such a problem or knows the solution?
Best regards,
dex

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