I was building at krona castle and I noticed that even when the wall is very very slightly clipped into the wall it will no longer become accessible. Even when the entire wall is seemingly outside and should be accessible.
Pics to better explain and visualise:
https://cdn.discordapp.com/attachments/1134583605985820692/1395475436418498641/IMG_3773.jpg?ex=687a9546&is=687943c6&hm=a79d78974461dc9a43a68676f71e925f69a2d80b27c66bca2dad25dc700a9015&
https://cdn.discordapp.com/attachments/1134583605985820692/1395475534770733096/IMG_3774.jpg?ex=687a955e&is=687943de&hm=fcf35e3796566c2cea1d8d782364f83beb8be30281032d451241b700d7a341eb&