Limitations
The Authorized QoS Handling for Default Bearer feature has the following limitations:
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The combination of QoS flow binding parameters, such as 5QI and ARP, for the authorized QoS never remains the same as that of a dedicated bearer or flow. That is, change in QCI/5QI should not result in the default flow having the binding parameters similar to another flow.
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The SMF does not support changes to all the binding parameters except Allocation and Retention Priority (ARP) and the QCI/5QI (with or without session AMBR) in the Session Rules.
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When the QCI/5QI changes, the existing default bearer flow is modified toward N1, N2, and N4 interfaces. In this case, the SMF does not delete the existing flow instead of creating a new flow.