You can change the order in which the nRF Sniffer switches advertising channels when following a device. Define the order with comma-separated channel numbers, for example, 37, 38, 39. Press Enter when done.
With the default configuration, the nRF Sniffer waits for a packet on channel 37. After it receives a packet on channel 37, it transitions to sniffing on channel 38. When it receives a packet on channel 38, it transitions to sniffing on channel 39. When it receives a packet on channel 39, it starts sniffing on channel 37, and repeats the operation.