Analysis background switched to light from dark


I have an analysis that has always had dark background. For some reason, it automatically switched to light background without any edits from the owner. The weird thing is, all analysis & dashboards that were copied using this analysis also automatically changed backgrounds. Any idea why this happened?

Could it be that someone edited the underlying theme being used in these analyses and dashboards?

No it wasn’t updated. The weird thing is, I had created a couple other versions of the analysis and all versions have this same issue.