RAX80 randomly disconnects LAN cable

Hi there, seems like some people are lucky and others not. I recently purchased a brand new RAX70 and have had the same strange issue ever since i got it and have had to keep contacting netgear support every week and currently still doing so. My rax70 seems to suddenly drop ethernet connection every couple of days. It seems to do it around 10pm and also my wife said it has also occurred overnight early hours in the morning. Wireless still seems to work with internet connection but its always lan that gets kickes out for couple of minutes or so then comes back. Netgear questioned my internet connection but it doesnt seem to be that, led light on modem is constantly lit the correct colour to indicate connection so no issue there. All leds on router still seem to be lit so no indication there is an issue when it happens. Keep checking router logs, nothing to indicate any disconnection from what i can see. So far with support, have changed mtu abd dns settings, then done a manual firmware reflash and complete reset of router and set up again, still having issue. Now they want me to take my netgear 8 port ethernet switch out as thats in between my wired devices and router but has always worked flawlessly with my old router so cant see it being an issue but will have to give it a try i suppise to take that out as a cause for the problem. This is starting to annoy me and driving me mad. No matter what i have tried it still keeps cutting out ethernet connection every couple of days. If yourself or anyone else has any ideas please get back to me. Will appreciate any info anyone can give to help.