RAK3172: Extra +EVT:TX_DONE waking up from sleep

Hello,

This post explains the reason for multiples +EVT:TX_DONE received:

https://forum.rakwireless.com/t/rak3172-one-send-double-answer/13883/2?u=igtti

My current issue is:
After sending the payload I wait for the “SendCallback” and go to Sleep. It works most of the times. But, when the extra +EVT:TX_DONE comes it wakes the system up!

I haven’t found a way to detect this and prevent the system from being waked up.
Please, how to handle this extra +EVT:TX_DONE ?