Raspberry Pi GPRS/GPS Tracker HAT power issues

Has anyone else had a problem using GSM/GPRS on this board simultaneously with the raspberry pi onboard Ethernet?

For me, the Ethernet loses connectivity for a few seconds whenever data is transmitted.
I have tried using the PPP tutorial on the product page and communicating directly with the M95 module using AT commands via UART.

Both methods are successful at transmitting data to a server, but the Ethernet issue is present with both methods.

It is only resolved when the tracker HAT is powered from a second raspberry pi which is leading me to think its a power issue.

Try running “dmesg” at the RPi command prompt and look for messages like,

Under-voltage detected!
Voltage normalised