LESC with MITM for Peripheral hardfault running on FreeRTOS Issue

Question

Hello: 
 
 I am porting the LESC with MITM security protocol from your "ble_app_multirole_lesc" example inyo a project that runs FreeRTOS. This is on an NRF32540 With s140. 
 
 I am implementing MITM identical as in the example - a button determines if we accept or deny the bonding. However I have run into issues where a hardfault is triggered after a button admits/rejects the connection. The hardfault seems to be when FreeRTOS is switching contexts (function xPortPendSVHandler in port.c) , and it happens in PendSV. My issue seems to be exactly the one described here ( https://devzone.nordicsemi.com/f/nordic-q-a/45268/data-bus-hard-fault-when-handling-secure-connection-bonding ) but unfortunately I could not find the solution. I preferred to make a new case rather than reviving a years old one.

Thinking it had to do something with the button interrupt throwing everything into haywire, I modified the import of the example to set a flag in the button interrupt. A thread will check for that flag and execute the bond check code (rather than it happening on an interrupt context). I did the following (other than porting the code from the example to my file):

Notes on importing: You will need to do the change as mentioned here: https://devzone.nordicsemi.com/f/nordic-q-a/59655/lesc-and-freertos?ReplySortBy=CreatedDate&ReplySortOrder=Descending 
 On my BLE file 
 
 static void bsp_event_handler(bsp_event_t event)

...

case BSP_EVENT_KEY_0:

 SetBondingAllowed(true); /*Set a flag so "on_num_comp_button_press" is called from
 a thread later on rather than in the interrupt*/
 
 break;

case BSP_EVENT_KEY_1:
 SetBondingAllowed(false);
 break;

On my thread 
 
 void vApplicationIdleHook( void )
{
#if NRF_LOG_ENABLED
 if(flagBondConn)
 {
 flagBondConn = false;
 on_num_comp_button_press(bondResult);
 }
 vTaskResume(m_logger_thread);
#endif
} 
 
 My question is, is this correct? I see it currently working, but I am not sure if I am missing another example or patch that has implemented LESC with MITM running on FreeRTOS. We really need Freertos for the complexity of our project! Do you think the SD call to check the bond (sd_ble_gap_auth_key_reply) cannot be called on an FreeRTOS context? 
 
 Let me know what you think! 
 
 Thanks, 
 
 Eduardo