BLE scan is deaf for EMBC02 beacons

[duffo64]

WiPy 2.0 or LoPy, both running 1.7.9.b3 firmware.

Strange BLE issue: an EMBC02 beacon advertising every second cannot be seen from WiPy (sometimes it catches one advertisement in 30 or 40). EMBC02 can advertise with its proprietary format (the trace below) or as a standard iBeacon/Eddystone; however, WiPy never sees it.

It's the unique type and make of device not seen until now (I have several). Did a scan with my Ubertooth One posting here the trace of one advertisement hoping that some expert sees why the ble stack is deaf for these devices:

systime=1503417955 freq=2402 addr=8e89bed6 delta_t=1008.339 ms rssi=-39
02 25 b4 46 0b ee f3 0c 0f 09 45 4d 42 65 61 63 6f 6e 31 38 30 39 31 00 0e ff 5a 00 bf f8 30 32 29 00 07 d2 e1 c0 01 23 21 3f 
Advertising / AA 8e89bed6 (valid)/ 37 bytes
    Channel Index: 37
    Type:  ADV_NONCONN_IND
    AdvA:  0c:f3:ee:0b:46:b4 (public)
    AdvData: 0f 09 45 4d 42 65 61 63 6f 6e 31 38 30 39 31 00 0e ff 5a 00 bf f8 30 32 29 00 07 d2 e1 c0 01
        Type 09 (Complete Local Name)
           EMBeacon18091.
        Type ff (Manufacturer Specific Data)
           Company: EM Microelectronic-Marin SA
           Data: bf f8 30 32 29 00 07 d2 e1 c0 01

    Data:  b4 46 0b ee f3 0c 0f 09 45 4d 42 65 61 63 6f 6e 31 38 30 39 31 00 0e ff 5a 00 bf f8 30 32 29 00 07 d2 e1 c0 01
    CRC:   23 21 3f