I'm editing this post because I found the items. However, it's not working as intended and I wanted to be sure to share exactly what happened in case it happens to someone else. Ok, so normally if you retrieve all items from postmaster using dim, any item that doesn't fit in your inventory returns to postmaster, right? So I had a few green solstice items in my inventory that I had completed. I clicked retrieve all from postmaster and a few disappeared. This happened twice. The first time I thought I accidentally dismantled it and grabbed another from collections. The second time they were ALL LOCKED. Of course I locked them, I didn't want to make the same mistake twice and had no reason to suspect the dim. The second time they disappeared I knew there was some sort of glitch or something. So because of the below comment I thought well, I'll check the vault just in case that's where it got moved and I found them. There's no way I mistakenly moved them there because I wasn't even on the character portion on dim. You'd have to move them from there. Retrieve all from postmaster was the only thing I clicked and the postmaster was still open when I checked it again. So if your solstice armor disappears after retrieving all items from postmaster using dim, check your vault. It might be there. I'm probably just not going to retrieve anything I don't have room for until this stupid quest is done. 😑 My clanmate says it happens to him sometimes if he has blue items in his inventory. I've never had it happen to me before because I always delete it right away. 🤷‍♀️