Just discovered others experiencing this issue with other shows:
The EPG used to be based on Gracenote, they changed it over to using another provider in July (think it is now Tivo)
Gracenote & TVDB used to match up, the new provider doesnt have the information for many shows, so just uses the current date when it doesnt have a S/E which fails to match with tvdb
For the UK, what is used for the Freeview OTA Broadcast lineup is the TV Guide data from https://www.freeview.co.uk/ - The main issue was that the data was April 2019 data and missed out the freeview change announcements for May and June. This was addressed but there are still few errors like E4 and Home and Movies4Men+1 plus a few more
Also freeview themselves have errors in their data - eg 235 is missing
Seeing the same thing with the files on my HDD where it adds 2019 to the name and loses the episode data. Glad I’m not the only one, but looks to be a larger issue.