I recently made a Nautolan with hopes of using the DS corruption and came across the issues.
If I use the basic equip slot as my outfit and have the corruption active then it shows but often disappears/deselects when moving between planets and when I log in initially.
However with the outfitter slots the corruption does not appear when selected and if I leave the character page and reopen it to the outfitter tabs the corruption option has been deselected.
The character is specifically a female Nautolan Consular Sage.
Hope these details shed some light on this.