Bluetooth iBeacon/multiple advertising/extended advertising

[ppreininger]

Hi,
I'm using the nrf52840dk. I created an advertising, which works quite well. The second thing I want to do is add an extended iBeacon advertising. In wireshark I can observe the normal advertising, which also contains all data, the extended advertising is shown as "anonymous", the packet only shows the extended advertising header, but no data.
Advertising param flags for the first advertising set is BT_LE_ADV_OPT_USE_IDENTITY | BT_LE_ADV_OPT_CONNECTABLE
Beacon advertising param flags is BT_LE_ADV_OPT_EXT_ADV
Changing the flags for the beacon advertising set does not change anything. Beacon data for advertising is taken from the iBeacon sample.
Also when I try to use the broadcaster_multiple sample, I only see the extended advertising packets - both of them - with their headers, but no data is shown.