Hello,
It looks like this changeset introduced a gap in the "Anglesey National Landscape" relation (10676742).  I fixed that in https://www.openstreetmap.org/changeset/164158424 .  If you do find yourself modifying ways that are part of a relation you can check them by following https://www.openstreetmap.org/user/SomeoneElse/diary/406398 , but in a case like this you'll need to notice that the ways you edited were actually part of a relation, since neither you nor I changed the relation itself, just the geometry of the ways that make it up.
As ever, and questions - please don't hesitate to ask!
Best Regards,
Andy