Help with ubertooth jamming

I'm trying to establish a 'classic' bluetooth jamming function on the ubertooth. I looked at the ubertooth-btle jamming implementation an wrote a similar code addition for the bluetooth jamming.

I want to follow a connection and after the hopping sequence is found, i want to jam this connection. My bt_jam function is:

void bt_jam(void)
{
#ifdef TX_ENABLE

    cc2400_set(MANAND, 0x7fff);
    cc2400_set(LMTST, 0x2b22);
    cc2400_set(MDMTST0, 0x334b); // with PRNG
    cc2400_set(GRMDM, 0x0df1); // default value
    cc2400_set(MDMCTRL, 0x0029);

    while (!(cc2400_status() & XOSC16M_STABLE));
    cc2400_strobe(SFSON);
    while (!(cc2400_status() & FS_LOCK));
    TXLED_SET;
    while ((cc2400_get(FSMSTATE) & 0x1f) != STATE_STROBE_FS_ON);
    cc2400_strobe(STX);
#ifdef UBERTOOTH_ONE
    PAEN_SET;
#endif
#endif
}

I called the jamming function in the bt_stream_rx() right before handle_usb(clkn); when the jamming mode is !=JAM_NONE. Unfortunately the ubertooth seems to freeze when calling the jamming function. What is different here from the BLE jamming implementation which seem to work right? Is there also any way to wait with the jamming until the complete hopping sequence is found?

Version information

Operating system: kali linux, raspbian and windows

Ubertooth tools version (ubertooth-rx -V): libubertooth 1.1 (2018-08-R1), libbtbb 1.0 (2018-06-R1)

libbtbb version:

Ubertooth firmware version (ubertooth-util -v): Firmware version: 2018-08-R1 (API:1.05)

greatscottgadgets / ubertooth

Help with ubertooth jamming #364

Version information