some hints on the "Mismatch between server and client text" error

[goulf-3m]

I often see this error (in neovim), but still did not find a way to predicatively reproduce.

However, I find that, it can often occur when lsp is restarted (LspStart after some other error) and I write the file.
When this case occur, and I restart lsp again, it will surely throw this error again (and again if I restart lsp again)!
With the same workspace/setup, and I restart neovim, it will be OK, not throwing errors when I write the file.

Another hint: when this case occur, after I restart lsp, and introduce some change to buffer (no writing to disk) and ask lsp to code-format, it gives me the formatted version from disk!

The typical sequence:

... (some unknown reason causes lsp to abort)
I noticed this and call :LspStart
do edit and save
(now it's quite probable that lsp will abort again, if so)
I call :LspStart
do edit and save
lsp will surely exit with this mismatch error
I call :LspStart
do edit and save
lsp will surely exit with this mismatch error
I call :LspStart
do edit (no save)
call code-format (provided by lsp)
previous edit is lost!