Bug: Switching pane to terminal pane before Prettier finishes inserts strange characters

Do you want to request a feature or report a bug?
bug

What is the current/expected behavior?
Current:

1. Save buffer
2. Move to :term window while prettier is running in the background
3. Vim freezes
4. press ctrl+c, "Can't parse buffer" error appears.
   
5. Go back to original pane, there are strange characters on top of the file
   

Expected:
vim-prettier can still update the old pane if you move to a term pane before it finishes

What version of vim-prettier are you using - (output of :PrettierVersion) ?
1.0.0-alpha

What version of prettier are you using - (output of :PrettierCliVersion) ?
2.0.5^@

What is your prettier executable path - (output of :PrettierCliPath) ?
prettier

Did this work in previous versions of vim-prettier and/or prettier ?
Not sure, I recently switched from tmux to :term. I've been seeing occasionally at work but finally can repro consistently on my rasbperry pi since it's slower and gives me time to switch panes before prettier finishes.

Reproduce the issue in vim-prettier by saving a buffer, switching to a :term pane while Prettier runs, and interrupting it if Vim freezes. Trace the asynchronous formatting path involved in updating the original pane. Done means switching panes does not insert strange characters, freeze Vim, or produce a "Can't parse buffer" error.