UE receiving paging for performing CSFB, while expected to perform a VoLTE call

Dears Experts,
We are facing an issue related to VoLTE in Huawei Network.
For some reason during our DT (I do not have the logs yet) the UE is receiving a paging on CS-Domain for performing a CSFB, while was expected to perform a VoLTE call.
The switches for allowing a CSFB while in bad quality are NOT active.
Have you ever experienced something similar?