-rr flag when both having "-of JSON" and "-of XLSX" causes error

I found out that when adding both "-of JSON" and "-of XLSX" parameters on CL (in any order), it is possible to get as well a JSON as Excel validation report. This is something we want for our OS "Smart Submission Dataset Viewer".
When then also adds the flag "-rr" (raw report), one gets the error "--raw-report can be used only when --output-format is JSON", this although also "-of JSON" is present.