Nimsuggest issue with the VS Code extension and nim 1.6.0

[jasonfi]

This happened to me when doing a lot of find/replace across many files. The 
more files, the more nimsuggest processes were launched. It helped to let them 
complete down before proceeding. The solution is to turn off the feature when 
changing many files at once. Then turn it back on, but let the processes run 
and complete, I guess it's checking the last changed timestamp against a cache 
somewhere, or something like that.