1. Device : Samsung Galaxy S9+ (SM-G965N)
2. Android Version : 8.0.0 (Stock Rom)
3. Reason : Exynos 9810 model has Cirrus Logic CS47L93, and Snapdragon 845 model has Qualcomm WCD9341. My phone has Exynos and I post this with my 'audio_policy_configuration.xml'.
audio_policy_configuration.xml