Looks like my update didn’t post - here we go again …
Sorry Dewi. Too much water has flowed under that bridge. If memory serves the hotbar was full, dropped an intem in the inventory proper to make room, picked up the elder cloak, checked my inventory, not there, looked at the ground, not there.
Since then, I have seen a handful of inventory, specifically lost item, bugs. They are hard to document since they happen in a moment. Though I do play with video buffering on all the time now, so easy enough to grab that 15 seconds of video when I notice something.
One amusing Forum chest bug I played with for a while. I am a bit obsessive compulsive about inventory storage - all weapons together, all wands together, etc. I had 9+ cores in my inventory and I had to move them all down to make room for more gear up top. While moving them I found a core that, when placed in an open slot, would bounce back to its original slot. I tried placing it in that slot several times with it bouncing back each time. On a reload of the game, the slot would store the core just fine.