You might also try deleting your Nim, Nimble, ~/.nim, and ~nimble/ directories and do fresh reinstalls. In an empty Nim file nimsuggest shouldn't act up too much, but sometimes the nimble libraries or caches get messed up and cause nimsuggest to die a lot.
Theres also timeout options for nimsuggest in the VSCode plugin that you can set lower which will restart nimsuggest more often.
