I made a simple value vs date line plot for a test dashboard last week, and ended up leaving it displayed on a log scale. The values for dates since I made it have been zero, hence breaking the line plot because of the log scale. Now when I go back to edit the question, it won't output in any format, including a flat table, unless I create a new question. This isn't critical for us, but it is a strange bug I thought I should highlight.
Interesting. Thanks for bringing this to our attention. Did you see this on the latest version of Metabase?