Hi Team,
When I have 2 dependent fields and both need to be single selected, so I have to enable "Always one Selected one" option on both fields which creates a terrible problem as it blocks some values if respective values don't have any relation.
To avoid this issue, QlikSense should have toggle selection option in QlikSense filter object without enabling "Always one Selected one" option. It will resolve many issues because we have to do many unnecessary workaround to make such scenario happen.
Also, I would suggest to have RADIO & Check boxes option in filters (of course with toggle selection)
We have to use extensions for this which creates issue while working in big companies from maintenance and security perspective.