Apple released tvOS 15.5 today, so if you are having issues with earlier versions you probably should update.
I updated to it. It takes about 5-10 minutes is all. When it finishes and the screen returns to the TV, the remote will likely not work for another few minutes. That is typical of tvOS updates and the newest remote. I think they push a separate update to the remote after updating the ATV. So far everything seems to work okay. I doubt this is much of an update, so don’t expect new features. Maybe they fixed a few bugs, or maybe they just want to keep the naming scheme matching all their other 15.5 OSes they released today.
I updated to it. It takes about 5-10 minutes is all. When it finishes and the screen returns to the TV, the remote will likely not work for another few minutes. That is typical of tvOS updates and the newest remote. I think they push a separate update to the remote after updating the ATV. So far everything seems to work okay. I doubt this is much of an update, so don’t expect new features. Maybe they fixed a few bugs, or maybe they just want to keep the naming scheme matching all their other 15.5 OSes they released today.