RAX 120 V1 Firmware Version 1.28.40 constantly powering off and rebooting multiple times

Hey Furry, thanks for the quick response. I don't have a modem that the router is connected to as my ISP does not require this. The router is directly connected via a fibre cable to an outlet in the wall set up by my service provider, Fibrestream: https://www.fibrestream.ca/faqs#:~:text=You%20need%20a%20Wi%2DFi,Modems%20are%20not%20compatible.

I am using a CAT8 ethernet cable between all my devices and the router. I am using the 5G/multi-gig port not the WAN port. < What is the connection rate supported on the ISP ONT? 1Gb or 2.5Gb? If 2.5Gb, CAT6A STP would be recommended, not UTP.

Have you tried the Yellow WAN port on the RAX connected to the ISP ONT? 

The router has done this reboot when I have only had my mobile phone (iPhone 12 Pro Max) actively using Wi-Fi and am surfing the web late at night. It seems intermittent as there are only a maximum of 7 devices connected to the router at any given time. I eliminated the possibility of overheating as the router is not warm to the touch when it has performed the reboot. 

I live in an apartment complex so there are a few neighbouring wifi's nearby though not many (about 10 or so from what I can see in the list) - I am on the 24th floor in a building of 32 floors.
Is there any Transmit power settings under Advanced Tab/Advanced/Wireless Settings? 

I have attached a screenshot of my advanced wireless settings as requested. 

I do not have Armor nor have ever enabled it, same with SPC I believe. Traffic Meter was the same until last night as I wanted to see the usage/logs but then disabled it. To confirm, before this I had never enabled Traffic Meter and the issues were occurring before I had ever enabled this.

Hope this helps!