Radio init failing with I2C communication - stm32

Question

I'm using an STM32WL55JC in dual core configuration to communicate with LoRa protocol. I'm also working on an OLED display interface using I2C communication on the same MCU.
The OLED interface comes from this library that I reworked a bit to use with STM32WL.
I have a working application using LoRa communication without OLED interface. The OLED interface works well without the LoRa application.
But when I join the two projects, the radio init function sends me to the ErrorHandler...
After investigating I found some weird things happening...
First, the radio init bug occurs only when I'm calling ssd1306_WriteString. But it doesn't matter what is in this function, in fact if I comment out everything in it, it's still bugging... So just the fact that I'm calling the function makes my program fail... Might it come from the parameters of the function?
Secondly, if I call ssd1306_WriteString before the radio init, it prints what I want on the screen and when the radio init happens, ErrorHandler is triggered. But also, if I'm calling ssd1306_WriteString after radio init, ErrorHandler is triggered on radio init... How can it be possible? ssd1306_WriteString() was never called and it makes the radio init bug?
I really can't find any links between all of this... My suggestion is that it may come from the font parameter of ssd1306_WriteString() function. But what is the link between that and the radio? Or maybe the problem is not about the radio but about dual core configuration?
----------------------------------------------------- MAIN --------------------------------------------------
int main(void)
{
// --------------------------
// --- Initialization ---
// --------------------------
// Hardware configuration
hardware_config();
ssd1306_Init();
ssd1306_SetCursor(2, 0);
ssd1306_WriteString("Font 16x26", Font_16x26, White);
ssd1306_UpdateScreen();
// Radio Management Initialization
g_radiocom_mgt.initialization(&g_addressing_protocol, &g_EEPROM_emul_driver);
}
---------------------- RADIO COMMUNICATION INITIALIZATION------------------------------------
void radio_com_mgt_c::initialization(addressing_protocol_c *i_p_addressing_protocol, EEPROM_emul_driver_c *i_EEPROM_emul_driver_c)
{
// Variable declaration
RadioEvents_t RadioEvents; // Radio events function pointer
// Attributes initialization
m_p_addressing_protocol = i_p_addressing_protocol;
// Radio initialization
RadioEvents.TxDone = OnTxDone;
RadioEvents.RxDone = OnRxDone;
RadioEvents.TxTimeout = OnTxTimeout;
RadioEvents.RxTimeout = OnRxTimeout;
RadioEvents.RxError = OnRxError;
Radio.Init(&RadioEvents);
// Radio Set frequency
Radio.SetChannel(RF_FREQUENCY + m_frequency_channel * (BANDWIDTH_VALUE + BANDWIDTH_GAP));
// Radio configuration
Radio.SetTxConfig(MODEM_LORA, TX_OUTPUT_POWER, 0,
LORA_BANDWIDTH,
LORA_SPREADING_FACTOR,
LORA_CODINGRATE,
LORA_PREAMBLE_LENGTH,
LORA_FIX_LENGTH_PAYLOAD_ON,
true, 0, 0,
LORA_IQ_INVERSION_ON,
TX_TIMEOUT_VALUE);
Radio.SetRxConfig(MODEM_LORA,
LORA_BANDWIDTH,
LORA_SPREADING_FACTOR,
LORA_CODINGRATE,
0,
LORA_PREAMBLE_LENGTH,
LORA_SYMBOL_TIMEOUT,
LORA_FIX_LENGTH_PAYLOAD_ON,
0, true, 0, 0,
LORA_IQ_INVERSION_ON,
true);
Radio.SetMaxPayloadLength(MODEM_LORA, PAYLOAD_LEN);
// Reset tx buffer
memset(m_BufferTx, 0x0, PAYLOAD_LEN);
// starts reception
Radio.Rx(RX_NO_TIMEOUT);
// register task to to be run in while(1) after Radio IT
UTIL_SEQ_RegTask((1 << CFG_SEQ_Task_Radio_Com_Mgt_Process), UTIL_SEQ_RFU, radio_com_mgt_task);
}