Confirming completion deletes next word

Result from CocInfo

## versions

vim version: NVIM v0.5.0
node version: v17.9.1
coc.nvim version: 0.0.82-48001524 2022-12-23 11:32:14 +0800
coc.nvim directory: /afs/csail.mit.edu/u/z/zli11010/.local/share/nvim/plugged/coc.nvim
term: tmux
platform: linux

## Log of coc.nvim

2023-07-12T18:50:11.621 INFO (pid:2519281) [attach] - receive notification: highlight []
2023-07-12T18:50:11.705 INFO (pid:2519281) [plugin] - coc.nvim initialized with node: v17.9.1 after 304

Describe the bug

For some language servers, confirming a completion deletes the next word if there's no space between the cursor and the next word.

Reproduce the bug

I will use jedi-language-server as an example, but I've experienced the issue with e.g. coc-json as well.

Create file mini.vim with：
```
set runtimepath^=/path/to/coc.nvim
```
Get jedi-language-server either through :CocInstall coc-jedi or by putting the following in coc-settings.json:
```
{
"languageserver": {
"python": {
  "command": "jedi-language-server",
  "filetypes": ["python"]
}
}
}
```
Start editing a new Python file with command: nvim test_coc.py -u mini.vim
Write some Python code. Then, put the cursor at the beginning of a variable, go into insert mode, start typing something, and accept an autocomplete suggestion with Ctrl+Y. The variable immediately following the cursor has disppeared. See below for screenshots.

Expected behavior

The word following the cursor should not disappear when I accept an autocomplete suggestion. Or, if this was intended behavior, then it would be great if there was a way to disable this behavior. (I tried to find how to disable it but was unsuccessful.)

Screenshots

For example, suppose I have a function and am calling the function, but I later realized I want to pass an additional keyword argument, like so:

Upon confirming the selected autocomplete suggestion, more_args disappeared:

neoclide / coc.nvim