After you disable CacheServer during ongoing upload, all next uploads will stuck

Steps:

• preparation: clear Accelerator cache folder
  1 Create new HDRP project (or use any relatively big project you have)
  2 Open project and enable Cache Server in Project Settings (connect to working instance of Accelerator, e.g. local one on your machine)
  3.1 Close Editor
  3.2 Delete Library folder
  3.3 Reopen Editor
  4 Wait while Editor loads and becomes responsive, then go to the right lower corner and unfold "Background Tasks" window - there should be "Upload artifacts" progress bar
  5 While it is still uploading go to Preferences->AssetPipeline and disable CacheServer
  6 Enable CacheServer again
  7 Go to Project browser, select any big folder (I use Assets\SampleSceneAssets\Textures for my testing) and RMB->Reimport it
  8 After it is finished - there should be a new progress bar in Background Tasks" window
  9 Check - that progress bar is stuck 
   
   
  Actual result: progress bar is stuck 
  Expected result: progress bar is NOT stuck