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assert failed: block_locate_free tlsf.c:572 (block_size(block) >= size)

<snipped backtrace for brevity>

0x400821ca: panic_abort at C:/Users/felix/esp5/esp-idf/components/esp_system/panic.c:412
0x40093789: esp_system_abort at C:/Users/felix/esp5/esp-idf/components/esp_system/esp_system.c:135
0x40099eea: __assert_func at C:/Users/felix/esp5/esp-idf/components/newlib/assert.c:78
0x400990e0: block_locate_free at C:/Users/felix/esp5/esp-idf/components/heap/tlsf/tlsf.c:572
 (inlined by) tlsf_malloc at C:/Users/felix/esp5/esp-idf/components/heap/tlsf/tlsf.c:934
0x40098c33: multi_heap_malloc_impl at C:/Users/felix/esp5/esp-idf/components/heap/multi_heap.c:217
0x400823cd: heap_caps_malloc_base at C:/Users/felix/esp5/esp-idf/components/heap/heap_caps.c:146
0x4008242b: heap_caps_malloc at C:/Users/felix/esp5/esp-idf/components/heap/heap_caps.c:166
0x4009528e: xTaskCreatePinnedToCore at C:/Users/felix/esp5/esp-idf/components/freertos/FreeRTOS-Kernel/tasks.c:876
0x400ec48d: esp_nimble_enable at C:/Users/felix/esp5/esp-idf/components/bt/host/nimble/nimble/porting/npl/freertos/src/nimble_port_freertos.c:41
0x400ec4b5: nimble_port_freertos_init at C:/Users/felix/esp5/esp-idf/components/bt/host/nimble/nimble/porting/npl/freertos/src/nimble_port_freertos.c:70
<my code below here - running in task context>

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void gl_ble_spp_server_init(void)
{
  nimble_port_init();

  /* Initialize the NimBLE host configuration. */
  ble_hs_cfg.reset_cb = ble_spp_server_on_reset;
  ble_hs_cfg.sync_cb = ble_spp_server_on_sync;
  ble_hs_cfg.gatts_register_cb = gatt_svr_register_cb;
  ble_hs_cfg.store_status_cb = ble_store_util_status_rr;
  ble_hs_cfg.sm_io_cap = BLE_SM_IO_CAP_DISP_ONLY;

  ble_hs_cfg.sm_bonding = 1;
  ble_hs_cfg.sm_mitm = 1;
  ble_hs_cfg.sm_sc = 1;

  ble_hs_cfg.sm_our_key_dist = 1;
  ble_hs_cfg.sm_their_key_dist = 1;

  /* Register custom service */
  int rc = gatt_svr_register();
  assert(rc == 0);

  /* Set the default device name. */
  char name[] = "TestBLEspp";
  rc = ble_svc_gap_device_name_set(name);
  assert(rc == 0);

  /* XXX Need to have template for store */
  ble_store_config_init();

  nimble_port_freertos_init(ble_spp_server_host_task);
}

void gl_ble_spp_server_deinit(void)
{
  esp_err_t ret = ESP_ERROR_CHECK_WITHOUT_ABORT(nimble_port_stop());
  if (ret == ESP_OK)
  {
    nimble_port_deinit();
    ESP_ERROR_CHECK_WITHOUT_ABORT(esp_nimble_hci_deinit());
  }
  enabled = false;
}

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while(1) {
  nimble_port_init();
  gatt_svr_init();
  nimble_port_freertos_init(bleprph_host_task);
  ...
  nimble_port_stop();
  nimble_port_deinit();
  ...
}

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void ble_spp_server_host_task(void *param)
{
  //This function will return only when nimble_port_stop() is executed
  nimble_port_run();

  nimble_port_deinit();
  ESP_ERROR_CHECK_WITHOUT_ABORT(esp_nimble_hci_deinit());

  //Delete this task
  nimble_port_freertos_deinit();
}

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static TaskHandle_t host_task_h = NULL;

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  ESP_LOGI(tag, "BLE Host Task Started");
  uint32_t notification;
  for (;;)
  {

    xTaskNotifyWait(ULONG_MAX, ULONG_MAX, &notification, portMAX_DELAY);

    nimble_port_init();

    /* Register custom service */
    int rc = gatt_svr_register();
    assert(rc == 0);

    /* Set the default device name. */
    char name[25] = "MYBTLE";
    rc = ble_svc_gap_device_name_set(name);
    assert(rc == 0);

    /* XXX Need to have template for store */
    ble_store_config_init();

    /* This function will return only when nimble_port_stop() is executed */
    nimble_port_run();

    // Wait here until the event calling nimble_port_stop has finished.
    // We should not need this but there is a race condition in the nimble port! Bad! 
    vTaskDelay(pdMS_TO_TICKS(100));

    nimble_port_deinit();

    // Do we need this? The matching init function does not seem to be called
    // ESP_ERROR_CHECK_WITHOUT_ABORT(esp_nimble_hci_deinit());
  }
 }