Can't expand some snippet

It may be my fault, but when I use the "[if err != nil](https://github.com/rafamadriz/friendly-snippets/blob/00ebcaa159e817150bd83bfe2d51fa3b3377d5c4/snippets/go.json#L117)" snippet in golang files. When I use `nvim-cmp` to confirm the snippet, it will be expanded to an empty string.

Here is my config:

```lua
{
'garymjr/nvim-snippets',
dependencies = { 'rafamadriz/friendly-snippets' },
opts = {
create_cmp_source = true,
friendly_snippets = true,
},
keys = {
{
'',
function()
if vim.snippet.active({ direction = 1 }) then
vim.schedule(function()
vim.snippet.jump(1)
end)
return
end
return ''
end,
expr = true,
silent = true,
mode = 'i',
},
{
'',
function()
vim.schedule(function()
vim.snippet.jump(1)
end)
end,
expr = true,
silent = true,
mode = 's',
},
{
'',
function()
if vim.snippet.active({ direction = -1 }) then
vim.schedule(function()
vim.snippet.jump(-1)
end)
return
end
return ''
end,
expr = true,
silent = true,
mode = { 'i', 's' },
},
},
event = 'insertenter',
}
```

Start by reproducing the issue with the friendly-snippets Go entry in snippets/go.json at line 117 and the provided nvim-snippets configuration. Trace the expansion from confirmation through the native Neovim snippet integration; done means the [if err != nil] snippet expands to its intended content instead of an empty string.

Written by the indexing model from the issue text.