Invalid operator import creates dangling workDoneProgress notifications

[Anrock]

HIE: Version 1.3, Git revision e61670f (3874 commits) x86_64 ghc-8.6.5
Stack: Version 2.1.3, Git revision 0fa51b9925decd937e4a993ad90cb686f88fa282 (7739 commits) x86_64 hpack-0.31.2
Nvim: NVIM v0.5.0-453-g685468057-dirty
With Coc as LSC

Repro:

1. Create testing stack project via stack new test simple
2. Have following src/Main.hs:

module Main where

import Data.Function ((&))
main :: IO ()
main = do
  putStrLn "hello world"

something = undefined

3. Wait for HIE to calm down with initializing project
4. Delete last ) on import Data.Function ((&))
5. Dangling loading workDoneProgress appears

Further modifying same file (like deleting undefined from something line) will create more dangling notifications.

Also opening this file with import initially broken will create a lot of dangling Starting LS languageserver.haskell.

LSP log from CoC

[Anrock]

Not reproducible in HLS, so whatever.