STM8 SPBTLE-RF bluetooth communication problem

[Alberto3]

Hello everyone, i've an issue using STM8L with an SPBTLE-RF bluetooth module.
It seems that the module stop to transmits data to the master after few time of utilization or during an intensive use.
I verified that when the module stop to transmits data, the INTERRUPT_HANDLER function which call the HCI_Isr function doesn't work.

The code of the INTERRUPT_HANDLER function:

INTERRUPT_HANDLER(EXTI3_IRQHandler, 11)
{
// Call to manage the packet received from the BlueNRG
HCI_Isr();
}

Anyone know why this happen and how can i fix it?