What are your router's settings (what did you change from out-of-the-box), what devices you have connected to it and how, etc.
Rolo, Out of the box I let everything set up automatically. Ive Disabled Smart Connect, Link aggregation. That's really all I have disabled out of the box. I'm not using any QoS because that really throws my router in a fit. The only feature I am using is port forwarding. And I also do have UPnP off. That's all that comes to mind atm. I do have my wireless on but currently don't have anything attached to this router but my xbox one x. And that is hardwired into gaming port one of the router. I also have IPV6 enabled. My knowledge isn't much when it comes to things like this. Ive never had to interact this much with a router before other then the basics.