File type detection fails

[zoopp]

I'm facing an issue in which file type detection fails when opening files named Dockerfile:

(note: file type is dockerfile instead of Dockerfile)

I'm not using any plugins that might interfere with this one. Do you have any idea how I can see which script sets the file type?

[alerque]

Same issue here in Neovim, and the upstream vim/neovim syntax is rubbish. Really what needs to happen is this needs to get contributed upstream!

Setting the ft manually with the capitalized version works, but auto-detection does not.