just saw this issue yesterday. before it was working normally for me.
The issue i just saw was some of my international channels have now some form of date stamp on them. not sure what those dates are, maybe the time it first aired but it's specific and fixed. for example this "show" has a date August 8, 2005 permanently fixed in its guide data. so now, all recordings for that show have a date stamp of August 8, 2005 instead of the date when it was recorded. 2 international shows i have have this kind of issue so recordings of shows in those 2 channels will just have the same dates when you view them in recordings. you won't have a clue which dates are those shows recorded. see attached screenshots for reference.