@DocTechnical, this issue is known by Tablo. Somebody reported it in November 2023, and Tablo responded that “this is a known issue, but we’re hoping to improve it as soon as we can!” Here is the link:
By the way, I can reproduce the issue on my ONN streaming device. The workaround for the issue is to toggle from “Favorites” to “All Channels”, scroll through all the channels until they load guide data, then toggle back to “Favorites”. (Another option is to use a competing product – which is the route that I recently took, partly because of my impatience in Tablo resolving known bugs like this one.)