With last Friday's update it appears that the Dashboard List Widget Separator color is overwritten by the dashboard's theme's "Axes and rule color" setting.
Previously, I would make the separator the same color as the background so it didn't show using the advanced formatting. The issue doesn't appear if I do not use advanced formatting, however, I require advanced formatting for my workflow. Now, after the update, the separator color setting is overwritten and inherits the "Axes and rule color" setting. See ArcGIS Dashboard List Widget Separator for a similar issue following a 2024 update.
Ideally, the List Widget's Separator color should override the dashboard's theme's color.

Greyish color does not render, instead it is overridden by the theme axis and rule color setting which is a bright blue.
