Tearing my hair our over this one.
I have a fairly normal setup at home. Unlimited fibre from VF with static IP connected via a WRT1900AC with latest firmware (192.168.1.1). Ive tried both a DSL4320 and the VF router in problem solving. Behind that is a domain served by an install of Server2012R2 Essentials (192.168.1.4) which provides the DNS and DHCP. It all works great on the wired five PC's and multiple other devices on WiFi.
When I start the Epic Launcher on any PC all the PC's lose connection to the internet. WiFi (non-domain) devices are fine, and can surf fine. No error lights on the modem. Cant access the server via remote desktop. I've tried giving a PC a static address and the google DNS, or the router DNS but no dice. There are no errors in the logs of the DNS on the server.
I have googled extensively and no solution is out thee, but other have opined its a DNS issue of some kind.
Would value any insights.