Radio Planner error with radio SX1276. RP: ERROR - IRQ source 0x0000 unknown

[vtoral]

I´m using radio SX1276 with LBM. Each time a package is sent, the radio planner shows the following messages:

 *************************************
  * Send Payload  for stack_id = 0
  *************************************
  Tx  LoRa at 320905 ms: freq:868500000, SF12, BW125, len 17 bytes 14 dBm, fcnt_up 5, toa = 1319
    RP: Task #1 enqueue with #6 priority
     RP: Arbiter has been called by rp_task_enqueue and priority-task #1, timer hook #1, delay 1813, now 319092, start_time_ms 320905
      RP: High priority task is in the future
     RP: Arbiter has been called by rp_timer_irq and priority-task #1, timer hook #1, delay 27, now 320878, start_time_ms 320905
      RP: High priority task is in the future
     RP: Arbiter has been called by rp_timer_irq and priority-task #1, timer hook #1, delay 7, now 320898, start_time_ms 320905
      RP: Launch task #1 and start radio state 2, type 2

RP- INFO - Radio task #1  running - Timer task #1 running  - Hook ID #1 -     TASK_TX_LORA      - start time @84940 - priority #6
     RP: INFO - Radio IRQ received for hook #1
     RP: ERROR - IRQ source 0x0000 unknown
lr1mac task aborted by the radioplanner
     RP: No more active tasks

I also have problems with the Join process, which I think is derived from the abortion of the lr1mac task. The packages are properly sent and reach the server, however no downstream message is received.