Skype no ringing tone with UI 6 upgraded

[Al-001]

I recognized that on my s23U skype doesn't has ringing tone when receiving in-coming calls although it has ringing tone for out-going calls. 

Microsoft considers phone OS's power optimization or SW configuration may cause the issue. Tried to fix the issue by following MS's suggestions/instructions, unfortunately the issue can't be fixed. 

I eventually uninstalled skype app and reinstalled it again, the issue is fixed.

Does anyone know what could be the real root cause?

[Helenna]

Hi, It's possible that the initial installation of the Skype app had a configuration or compatibility issue.

Reinstalling it might have resolved those issues, ensuring proper functionality for incoming calls.