This is a known problem. The multiple undo actions per single 'u' command bug has been fixed recently. The updated version of IdeaVim will be released soon. We

This is a known problem. The multiple undo actions per single 'u' command bug has been fixed recently. The updated version of IdeaVim will be released soon. We have been working on making IdeaVim more stable, see the changelog https://github.com/JetBrains/ideavim/blob/master/CHANGES.md https://github.com/JetBrains/ideavim/blob/master/CHANGES.md.