Migrating from Struts 2.13.x to 7.0.3 with custom taglib issue

Hi
I am immigrating Struts from 2.13.x to 7.0.3 for a very old project.
The project has its own taglib following the Struts style and uses
Freemarker for the template.
However, I am not able to get ${attributes} in the freemarker template.
I have not changed the structure of my taglib class and just updated
the dependency packages.
Inside my Java file I can see the addParameter adds the value to
attributes and evaluateParams() has been called,
but they are not accessible in the ftl files.
Any tips where should I start looking at my problem?

Thanks
Steven