The map always showed correctly, you just had the wrong box ticked for what you wanted to see (ie you had ticked the box for any FTTP - which in fact seems to include Virgin RFOG - rather than just OpenReach). Now you have ticked the box for OpenReach FTTP you are getting the results you expect.
The Address level map is any FTTP but a bug that was introduced when some more data was added to the system but not handled correctly has caused the issue
i.e. suggesting an FTTP service is available when its not.
System is pre-rendering a corrected version and will start appearing on 1st day of 2025