Dangling preview window after Outline is closed

[igbanam]

Result from CocInfo

## versions

vim version: VIM - Vi IMproved 9.1 9010100
node version: v21.6.1
coc.nvim version: 0.0.82-d1568d56 2023-09-29 19:43:34 +0800
coc.nvim directory: /Users/igbanam/.vim/bundle/coc.nvim
term: tmux
platform: darwin

## Log of coc.nvim

2024-02-26T21:27:44.810 INFO (pid:23314) [plugin] - coc.nvim initialized with node: v21.6.1 after 77
2024-02-26T21:28:13.546 INFO (pid:23314) [configurations] - Add folder configuration from file: /Users/igbanam/projects/coc-outline-bug/app/.vim/coc-settings.json
2024-02-26T21:28:14.087 WARN (pid:23314) [core-watchman] - Recrawled this watch 45 times, most recently because:
MustScanSubDirs UserDroppedTo resolve, please review the information on
https://facebook.github.io/watchman/docs/troubleshooting.html#recrawl
To clear this warning, run:
`watchman watch-del '/Users/igbanam/projects' ; watchman watch-project '/Users/igbanam/projects'`

2024-02-26T21:28:14.087 INFO (pid:23314) [core-watchman] - watchman watching project: /Users/igbanam/projects/coc-outline-bug/app
2024-02-26T21:28:14.145 INFO (pid:23314) [services] - LanguageClient Language Support for Java state change: stopped => starting
2024-02-26T21:28:14.146 INFO (pid:23314) [language-client-index] - Language server "java" started with 23354
2024-02-26T21:28:18.568 ERROR (pid:23314) [timing] - activate coc-java timeout after 5000ms
2024-02-26T21:28:19.834 INFO (pid:23314) [attach] - receive notification: showOutline []
2024-02-26T21:28:45.245 INFO (pid:23314) [services] - LanguageClient Language Support for Java state change: starting => running
2024-02-26T21:28:45.251 INFO (pid:23314) [services] - service java started
2024-02-26T21:29:02.306 INFO (pid:23314) [attach] - receive notification: doKeymap [ 'local-2-n-cA==' ]
2024-02-26T21:29:30.525 INFO (pid:23314) [attach] - receive notification: doKeymap [ 'local-2-n-PGVzYz4=' ]

Describe the bug

The pop-up preview for coc-outline stays up after the outline window's closed.

Reproduce the bug

• Open a file
• Open the outline with :CocOutline
• On any function, press p
• Press Esc

We will close your issue when you don't provide minimal vimrc and we can't reproduce it

• Create file mini.vim with：

  set nocompatible
  set runtimepath^=/path/to/coc.nvim
  filetype plugin indent on
  syntax on
  set hidden

• Start (neo)vim with command: vim -u mini.vim

• Operate vim with the instructions to reproduce the bug statued above.

Screenshots (optional)

Preview with :CocOutline open

Dangling preview after :CocOutline is closed

[fannheyward]

Reproduced with vim, not nvim.

[igbanam]

Fantastic 😍 Thank you for working on this!