Currently, the spectrum view relies on an explicitly set "auto grouping" (= band groups) property which includes all spectral bands that together provide a displayable spectrum. However, it is not obvious, why there shall be a band grouping at all, if there is only one spectrum in a given data product. Also, the concept "band grouping" is an advanced feature which many users are not (and should not) be aware of.

Fix: the spectrum tool should use band grouping only as a fallback. The preferred mode of operation should be to check, if there are any spectral groups based on the "spectralWavelength" property and a naming scheme used, e.g. "B<num>", or "reflec_<num>".