I’m visiting family in Korea using an ATV4 Gen with the new APP 5.3.0 (5837). So far no issues for me and I am still using my DNS proxy service. It’ll be a few months till I make it back to Thailand to try the update on my ATV 4K unit.
Another update released today to version 5.3.1 (5853), testing it now, seems stable on my ATV 4 gen. ATV 4K users please provide feedback if this issue seems resolved. When you upgrade the APP you should delete the previous version, reboot ATV then reinstall from the APP store.