## ([original issue on GitLab](https://gitlab.kwant-project.org/qt/adaptive/issues/21)) _opened by Bas Nijholt ([@basnijholt](https://gitlab.kwant-project.org/basnijholt)) at 2017-09-07T13:20:38.839Z_ Not sure why this happens, but kernel restarts can take >30 seconds sometimes. Probably running the notebook local and looking at the terminal will tell you more.