BUG: Data Visualization - client not able to see the data

The Data visualization for PAT variant is not working. All the Charts are empty even though the user has logged answers.

How to reproduce

Serve PAT variant, answer some questions, go to home screen, click 'Daten ansehen' / 'View your own data'. Click the upper bar 'primärdaten' / 'primary data' and select a question other than the daily note 'what else happened today'. All charts for all questions are empty.

Expected behavior

At least some of the charts should show bars.

Checkout the study version at https://pat.study.recoverycat.de/ There it works :)

Background

It seems as if things worked properly until we introduced the daily notes question...

As we are updating data visualization within the next month, we want to spend as little time fixing the old visualization. But it is still important enough to fix it now so that Pats – while we still use the old version – do not think their data isn't being logged even though they are answering the questions and then contact tech support or their HCPs.