ABC was the last network to agree to be included in DNS after the 2020 rule change
https://tvanswerman.com/2020/06/01/directv-loses-distant-network-channels-under-new-law/ and recently they have had periods where one or another was not available. You receive a DTV message "721 - Not subscribed to this channel".
Today the NY feed is not working, but the LA one is. This is very frustrating as we record network shows (not too many, but enough) off the NY feed. I guess I will waste another 2-3 hours on the phone with their tech support to try and get it resolved.
Update: I double checked the ABC east feed (396) as I was getting ready to post this and surprise, surprise it was back. The mystery continues.