not showing popup for certain trigger_word

[ssh352]

I made two identical snippets with different trigger words:

#' can't trigger popup
#' a can

could you please advise? Thanks! I run the latest release coc and latest cog-snippet.

[xi-lef]

Only typing symbols doesn't trigger CoC's auto-completion by default. You need to use snippets.triggerCharacters.
Do :CocConfig and add e.g. "snippets.triggerCharacters": ["'"], so the auto-completion triggers after you type '.