LoRaWAN downlink issue

Hello All,

We are using mbed os lorawan stack to run on the ST B-L072Z-LRWAN1 device.

The uplink to The Things Network is working as expected.

However. the downlink to the device is not working.
The device shows segmentation error whenever there is data received.

My issue is similar to the issue posted in GitHub

Is there any solution or workaround for this problem?

Thanks and Regards,