Experience Builder, Edit widget, transparency (background) not respected

[FredericPoliart_EsriAU]

Hi,

On ArcGIS Online (and probable Portal Enterprise ExB too), it looks like the Edit Widget's background color is not respected.

1. Create a window, anchor it to the right

2. Drop an edit widget

3. Edit widget : Style : background color : set bright yellow

4. Save , Publish, run : background of edit box is not using correct color