Invalid message "[invalid name]: false" while browsing filtered resources "Not in Package"

[pombredanne]

I browse a project (resulting from a docker pipeline on docker://docker.elastic.co/elasticsearch/elasticsearch-oss:7.10.2 .)
I Then select only files that are not in a package. And in the mimetype pie chart I clik on the "application/x-java-jmod" slice.

This creates a URL like this <....>/resources/?mime_type=application/x-java-jmod&in_package=false
But the filter in the resource list are not correct with a weird [invalid name]: false displayed:

Mime type: application/x-java-jmod
[invalid name]: false