Hello again,
It looks like the Chiltern Hills AONB got broken again here, and also the Icknield Way https://www.openstreetmap.org/relation/4719539 (though as you can see there are lots of other gaps in that still).  This happened before at https://openstreetmap.org/changeset/134088053 .
If you need any help detecting and fixing these, please don't hestitate to ask.
Best Regards,
Andy
