on height level 255 I take damage when ever I place blocks, and water pushes me when ever I eat food

https://youtube.com/live/tyMHdfxozqE

here is a link the file is to large to share, but essentially when ever I build on level 255 i take drowning damage instantly despite no water, when ever I eat food to heal, water pushes me off of my build.  This is making it impossible to continue playing my game, and attempting my world's largest Minecraft survival build.