Wired Network connection has become unstable since updating to xv3.70~78

Since I uploaded the Venus OS v3.70~78 on to my Cerbo-GX I have had to reboot the device twice because it has lost its connection to the internet. My Cerbo-GX is connected via a Cat5 network cable to my router so the WiFi is not an issue. The Cerbo-GX has never had internet connection issues previously.

Any ideas as to what may be causing the issue?