Terra users frequently use notebooks interactively to test Hail analyses on small portions of the genome. But running that same notebook over more data may take hours. For long running Hail jobs, if the browser loses its connection, users may not have all notebook cell outputs populated even though the notebook continues to run to completion.
If you wish to capture all Hail notebook cell outputs, use this notebook to run your long-running Hail notebook (or any other long-running notebook): https://app.terra.bio/#workspaces/help-gatk/Terra%20Notebooks%20Playground/analysis/launch/hail__how_to_run_a_notebook_in_the_background.ipynb
But also note that your analysis must complete within 24 hours.