[Reporting] Pie chart filter contains all values/contains at least one value isn't working

Affected version : 8.0.0 & above

Expected behaviour : When adding a pie chart and using the "Contains all values"/"contains at least one value" filter on a pie chart, the corresponding results should appear :

For example, for two requirements :

Requirement A with labels Test1 and Test2

Requirement B with label Test1

When selecting Test1 and Test2 and "Contains at least one value", all requirements should show up. When selecting "Contains all values", only Requirement A should appear.

Observed behaviour :

Currently, it is always behaving as if "Contains at least one value" was selected.