It seems that the LaTeX-cwl plugin prevents snippets from appearing in the autocompletion popup. If I remove LaTeX-cwl (or set “command_completion”: “never”), then snippets appear in the autocompletion list as expected.
Is this intended with LaTeX-cwl or a bug? Or, am I missing something?
I’m using Sublime Text 4 (4169).
Generally speaking, if something works without a package available but stops working when it’s there, then the most likely culprit is the package itself.
It is possible for plugins that add completions to the popup to tell Sublime to suppress other completions; it sounds like that is what is happening here.
It may be worth raising at issue with the maintainer of that package.