For the last several days I'm only seeing about a half dozen channels showing what's on when I go to Live TV->Guide (mostly locals and the FX stations, and AMC). Even in those it is only showing what's on for the next hour, despite providing a two-hour lookahead window as that part is blank on every channel. If I go to, say 9am, which is 40 minutes from now, I get a full guide with all channels having data for the entire window. Same for noon, 3pm, etc.
My Android TV clients continue to work just fine, so this seems limited to web. I have tried 2 different browsers (Brave and Firefox), incognito mode, manually clearing cookies and cache, and nothing has resolved it. Running v2022.09.07.2124 (though this started in the previous version I'd installed a few days ago), and my TVE provider is YTTV if any of that helps.