Failed to Connect to Instance

Failed to connect to instance. Xbox series X. CA/TX/WDC servers all do it. If I’m lucky enough to login, I can’t stay in for more than a few instances before it’s back to login. I’ve tried everything to no avail. Hard reboot/power cycle of Xbox and router/modem. Refreshing instance, reinstalled game. Any help would be appreciated.

To everyone in this thread, can you check if your ISP uses the IPoE or the PPPoE protocol?

Been having this issue all day yesterday, and still today. Nothing changed on my side prior to it. The game worked fine all league, and then smack. I cannot play at all anymore. Every instance, I have a 90% chance of getting sent to the start screen with "Failed to connect to instance.". Acts, my hideout, Kingsmarch, maps, anything... all give this DC. I tried deleting cache folders, updating drivers, verifying game files, reinstalling the game, restarting my router and Xfinity gateway, restarting my PC, uninstalling Nvidia Broadcast, DX12 versus Vulkan versus DX11 all causing the same crashes, Lockstep versus Predictive, Fullscreen versus Windowed Fullscreen, I disabled upscaling, tried turning off overlays, I increased cache size in my Nvidia drivers, tried different Nvidia settings. Literally nothing is working. I spent a lot of money on tabs this league too, and got to 99 and wanted to hit level 100 for the first time. This is a crime. Fix your game GGG.