I've been trying to nail an issue I'm seeing in the last week, mostly playing Destiny 2, Beyond Light. I started playing on Chrome with wired Stadia controller near the beginning of the pandemic, and have had 0 issues; I have video card that supports vp9 and am lucky to live in a neighborhood that is relatively new but has gigabit fiber connection- my connection is regularly 650-840 MB/s dl, 750-850 uL, with about 14-18ms. I am wired to my modem.
In the last 2-3 days I've been seeing jaggies popup as the resolution goes to utter crap; I see yellow for the status for connection, but it'll snap back into focus at 4k after 10-15 seconds. I've been monitoring my network during this time and can see a spike but the bandwidth is fine- in the past I have been able to stream and watch twitch/youtube while playing and those tabs/apps aren't affected by this at all. I'm not seeing anything in event viewer or other utilities. I haven't made any changes to the system, and literally no one else in the house is streaming.
I even tried using stadia enhanced to see if it could limit this from happening, but no dice. Any ideas what could be next steps? I've done the regular power cycle / ipconfig flush type steps I do for other issues.
No such issues on the Chromecast device itself.