macOS Catalina 10.15.7, Adobe Illustrator 26.5

In the latest versions of Adobe Illustrator, the SVG exporter when the decimals parameter is 1 low percentage opacities are rounded to 0 in the CSS styles of the SVG file. This problem did not exist in older versions of Adobe Illustrator (2017, 2018)

1. In a new Adobe Illustrator file make some paths or shapes, set fill color and set opacity to 10%.

2. Export for Screens / Format SVG.

3. Format Settings:
   Styling: Internal CSS
   Font: Convert To Outlines
   Images: Link
   Objects IDs: Minimal
   Decimal: 1
   Minify: false
   Responsive: false

4. Export Artboard

Expected result: SVG file with visible paths or shapes with lower opacity values (e.g. 10%).
Actual result: SVG files with hidden paths or shapes with lower opacity values. In the SVG file all Illustrator paths or shapes with lower percentage opacities (e.g. 10%) their CSS Style opacities are rounded to 0 not to 0.1 (from 10%)

This seems and behaves like a bug not a feature.