I've been streaming for some time (a few times each week, for 2'ish hours each time), with no issues. However, today I am not able to stream to either Twitch or YouTube. I've tested with multiple accounts on each platform, and using different applications on 2 different laptops. The results are the same. All frames are being dropped.
Spent a couple hours on the phone with Xfinity tech support. Other services seem to be working fine, and speedtest looks good. It is only streaming that seems to be affected.
I believe I've experienced this before, on the same day of the week (Sunday).