Hello, I think that this change might have caused a problem with a few relations.  I've mentioned it on the forum at https://community.openstreetmap.org/t/relation-breakage-on-the-coastline-northeast-of-swords/128284 .
To be clear, this absolutely isn't your fault - the problem is (a) the complicated way that relations are mapped here and (b) the way that the OSM editors don't notice that relations now have problems.
Best Regards,
Andy