@prologic@twtxt.net From what I can determine, this line was was culprit:
` environment:

  #- NAME="VltraPlus"

`
Removing the NAME from docker-compose.yml seems to have solved the cookie issue.
I can set the name in the Settings menu, but the cookie stays as twtxt.net=

My test twt is not displaying :(
https://tt.vltra.plus/user/laz/twtxt.txt