Crown of Troll King showing Impable now - But still is unimprovable

[Rocklobstar 290]

 

Came from the Indy Troll King kill yesterday.

[KaiH 1,126]

some items show the resource needed to improve the base material - in this case leather

most unimprovable items are of certain materials like crystal, bone or diamond (long list, often not shown as material) which are flagged unimprovable because of the material and show no item in the improve column

and a few unimprovable items have a basic resource material but are flagged as unimprovable per item and do show an item in the improve column

 

not a bug per say, but an inconsistency for sure.