DPR records a data objects as having a mime type of unknown/unknown for all input mime types on its list of types not to normalise (as they either cannot be processed or are already in a suitable preservation format). It should instead record the actual mime type (which it knows as this is one of the elements used to make this decision).
Fixed in ver_7_major changes branch and assigned to Kirti to test.
Tested on DPR 7.1.0. Mime type for not normalized records is recoded and can be viewed on the AIP information.