Feature counts show as "N/A" in layout exports when using themes

[philipjohnbarlow]

What is the bug or the crash?

A colleague alerted me to this yesterday so I did some testing for myself.

Map layouts with a theme and rule based, categorised or graduated style for a vector layer will show feature counts for each grouping/range in the layout but once exported to an image or PDF the counts are replaced with an "N/A" label.

Removing the map theme fixes the issue.

Steps to reproduce the issue

1. Create a project and add a base map and a vector layer to which you can apply a rule based, catergorised or graduated style to
2. Apply one of the above style types
3. Create at least one map theme in the project
4. Create a new layout and set the map to follow the theme
5. Add a legend for your vector layer and enable feature count from the legend properties
6. Export to PDF or image

Versions

3.34.4 and 3.36.0 (RC)

Supported QGIS version

• [X] I'm running a supported QGIS version according to the roadmap.

New profile

• [x] I tried with a new QGIS profile

Additional context

No response

[mastrolube]

Hello, I'm on 3.34.7 and still have this problem.

Hope someone will notice that ticket and try to find a solution. Thanks!