throttling

Hi I am currently trying to troubleshoot connection speed issue on my network. I have a 1Gbs + 1 Gbs connection. When I connect my PC directly to the ONT I am getting 960mbs up and down which is what I am expecting. When I connect the ONT back to the AXE 16000 2.5 WAN and connect one of the...

So here is the issue. Every time I try torrenting anything for 2-3 hours, my wifi throttles to a point where I go from 50mbbps to 10mbpps download. I need to reboot it every time to fix the issue. Can somebody help me with this? I am using stock Asus, although it happens on Asus Merlin as well.

I'm a former verizon employee with what should be the gigabit connection (940/880 though you almost never get that honestly) and so I knew from work experience to abandon their crappy Quantum gateway router. I instead have a Asus RT-Ac1750_B1 for a small apartment and mostly wired connected...