Just picked up a new Chromecast, YouTube is jerky when I set to 4K resolution. All videos, all resolutions. Totally fine in 1080p but I don't want to have to keep switching back and forth just to watch YouTube!

For comparison, all other apps work just fine, the issue is only on YouTube. Plugged my Chromecast Ultra back in to confirm and no issues there.

Anyone else seen this and had any success fixing it?