Returning S1-3 player having an incorrect/incomplete collection.
I grinded very hard during season 1-3 of D2 on Xbox. I completed the Leviathan raid multiple times, and went flawless in Trials of the Nine multiple times. I also owned the season pass back then that gave us Coldheart. I am now returning on pc now that I have a few friends on it and its gone f2p so I activated cross save. I realized after going through my collection. I noticed quite a few things that I have owned are not in there, such as Coldheart, Honor of the Nine (my favorite shader), and much of the Leviathan / Trials of the Nine weapons and armor I had obtained. This is annoying because on my titan I literally have Honor of the Nine shaders equipped on some of my armor, but it won't let me craft anymore. I tried to go on my Xbox to see if it would fix the issue for some reason, but it did not.
The items needed to be in your inventory (i.e. shaders equipped on guns/armor aren’t considered part of inventory) when warmind released & collections started in order to be tracked by collections. So you’ll need to earn those raid shaders again (the trials gear/shaders from year1 are gone for good unless Bungie brings them back).