union operator does not work with isfuzzy=true

According to the documentation (https://docs.loganalytics.io/docs/Language-Reference/Tabular-operators/union-operator) when setting isfuzzy=true "means that query execution will continue even if the underlying table or view reference is not present, yielding a warning in the query status results (one for each missing reference)".

This does not work. The query result is always:

• The query was aborted by the server. Details: 'where' operator: Failed to resolve table or column expression named..

You can simply try this out by using the example from the documentation page:

Does anyone know if this is a documentation or implementation problem ?

tnx //emil