Documentation doesn't pop in completion in some cases

[Cavern]

Checkhealth

health#compe#check
========================================================================
## compe:snippet
  - INFO: snippet engine is not detected.

## compe:mapping
  - INFO: `compe#complete` is not mapped
  - INFO: `compe#confirm` is not mapped
  - INFO: `compe#close` is not mapped
  - INFO: `compe#scroll` is not mapped

Describe the bug

I'm using gopls server with nvim-lspconfig.
On some symbols (always the same), the documentation doesn't pop on completion. If I start to type some chars, the documentation displays for some cases only (but not all).
Why I report this issue is because this seems to not be the case with coc and completion-nvim

To Reproduce

I use this minimal config

call plug#begin(s:plug_dir)
Plug 'hrsh7th/nvim-compe'
Plug 'neovim/nvim-lspconfig'
call plug#end()

let g:compe = {}
let g:compe.enabled = v:true
let g:compe.documentation = v:true
let g:compe.autocomplete = v:true
let g:compe.debug = v:true
let g:compe.min_length = 1
let g:compe.preselect = 'enable'
let g:compe.throttle_time = 80
let g:compe.source_timeout = 200
let g:compe.resolve_timeout = 800
let g:compe.incomplete_delay = 400
let g:compe.max_abbr_width = 100
let g:compe.max_kind_width = 100
let g:compe.max_menu_width = 100

let g:compe.source = {}
let g:compe.source.nvim_lsp = v:true

lua << EOF
require'lspconfig'.gopls.setup{}
EOF

Actual behavior

the documentation doesn't always pop

Expected behavior

the documentation should always pop

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.