nRF52DK as sniffer

Hello,
I'm trying to use the nRF52DK development kit as a Bluetooth sniffer.
after following your "nRF_Sniffer_UG_v2.2.pdf" guide, all I see in Wireshark are advertising messages of the peripheral device.
I'm using:

Wireshark 3.6.1

sniffer_nrf52dk_nrf52832_4.1.0.hex

tried Jlink
7.61b and 6.88a (as suggested in https://devzone.nordicsemi.com/f/nordic-q-a/83385/nrf-sniffer-does-not-show-connection-packets/346643#346643
with no success.
can you help me?

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