Apple TV Sleeps When It Shouldn't after tvOS 18.3 Update

Apple TV 4k (A2169) keeps sleeping after tvOS 18.3 update (22K557). No settings changed. "Sleep After" is set to "Never." Not sure how long idle is before it sleeps. Already attempted to set to something different and return to "Never." Also rebooted several times. CEC is not enabled. Worked fine before update. I have seen similar posts for previous tvOS versions, but none yet for 18.3. Troubling that this might be a recurring issue.