Thanks for submitting a bug report. Please provide the following information:

A description of the problem
I have zsh (with ohmyzh). Completions are working for cheat arguments but they are not working for the names of the cheatsheet files.

Example:
cheat tm<tab> does nothing even though a tmux cheat sheet exists in my ~/.config/cheat/cheatsheets/personal directory
cheat -<tab> generates a list of acceptable arguments for the cheat command

cheat version info
4.2.2