Reproduction

1. Make sure you have snippets with '#' as the first character.
2. Type '#'.
3. You get no completions for snippets.

This is probably because '#' is a trigger character for completions. I think snippets with '#' at the front are quite common so it makes sense to still have snippet completions after '#'.

Versions

OS: Ubuntu 16.04.3 amd64
VS Code: 1.19.3 (Stable)
C/C++: 0.14.6
Other Extensions: hars.CppSnippets 0.0.13