Hi,

We actually encountered the same issue, not with this driver but with a different modem based upon this driver, from what I remember (it has been a long time since I last investigated) it seemed as if each reconnect incremented the memory address of the buffers so something wasn’t getting cleaned up, I didn’t look into if this was the networking stack or the driver however. This was on Zephyr 1.14, it was also using MQTT but not that specific sample.

Thanks,

Jamie