Yes - I too am experiencing the exact same issue as Chris; the Channel Guide is no longer (automatically) updating & populating the information columns beyond just a few hours - showing nothing on any channel strip but "No information" after the TV has been on for a few hours. In order to re-populate the guide's information, one has to exit to Home, select "Live TV" and "OK", which as mentioned only adds information going forward again for just a few hours (where previously the information carried forward for many hours/days/infinitely, which was far, far better).
This seems to be a bug that was introduced with the update that reverted the channel icons back to the original, far superior icons without the disruptive backgrounds (a great fix BTW, thank you!).
Who knows if this "No information" change is somehow intentional or a true "bug", but it's a bad, bad change regardless!
In addition to this bug, scrolling the channel guide vertically often "stutters" or is very jerky - another "bug" that, too, seemed to arrive around the same time as the icon fix update. My suspicion is that this bug is related to the OS somehow struggling to populate the channel guide in the background OR it may have to do with it trying to figure out where to place the "Promoted" BS in amongst the guide UI elements.
One step forward... two steps back... 😣
I have checked for software updates and cleared the cache (press home 5 times, etc...) to no avail.
TLC 43S432 - ID; C133X - S/N; X00000AWK2AX - Software Version; 11.5.0 • build 4312-93