I know this is somewhat of a hassle and temporary but if you know the times of what you want to record you can always create manual recordings in the meantime until the guide information is corrected.
I believe in most of the apps (I’m using the Windows 10 app right at this moment) you can go to the Scheduled screen and there is a + in the upper right of it and clicking it will allow you to schedule a manual recording.
It was resolved for the PBS channels 50-*. However, channel 13 is still showing as MNT - it should be KCOP (I think). However, I have not tried to refresh the channel lineup recently. It may get resolved now. Try refreshing your channels and see if it gets resolved.
I did re-scanned the channels and the pbs channels show up correctly. However, when I saved the listing, they show up incorrectly…just like yours. My channel 13 also shows up as MNT. I didn’t pay much attention to that one since I don’t really watch that channel.
So how did you fix the pbs channels? Just re-scan? Or Tablo support helps you fixed it?
So I deleted all the channels except 1. Saved and wait for the guide to update. Then go back in and re-scan. Channel 50-1 (PBS-HD), 50-2 (PBS-2), and 50-4 (PBSwrld) are all correct. Saved. Now those channels changed to 50-1 (MNT), 50-2 (GRIT), and 50-4 (COURT). With that, the guide info for those channels are incorrect.
It seems that it has something to do with the incorrect guide database. But if that’s the case, then a lot more people should be affected.