(I've searched for an existing ticket but I did not find any. If I missed
it, sorry for the duplicate)
From the parts inventory of a particular set (example with 31202 - Mickey Mouse,
https://www.bricklink.com/catalogItemInv.asp?S=31202-1), the link "Add to my
inventory" does not contains the "itemColor" parameter. We have to choose the
right colour in the form.
It seems to me that this is a bug. If I am wrong, it would be a nice enhancement