Car access end to end example is not stable in the connection handover step, using handover_sn_mode=1. This is mainly reproduced in Peripheral handover (Serving node is Peripheral), where there are 2 failure types.
Firstly, the NWP_HANDOVER_CN_STATUS return status is not CONNECTION_EVENT_STATUS_SUCCESS. Re-executing connection handover provides a success return, and serving node connection is terminated. The candidate node is unable to sync with the established connection but does not terminate the connection. Second, Node 1 RX window does not receive the expected connection events, then Node 1 attempts to handover the connection and fails.