The Issue:

Trolley disappears when you try to store a trolley in itself

How to Reproduce:

1. Have a freshly spawned empty, equipped trolley (Notice you cannot put the trolley into itself like described in Step 3 if it is freshly spawned)
2. Put something in the trolley, you can either remove what you put in or keep it there, the trolley is now primed for destruction
3. Now Drag the equipped trolley from your inventory over the trolleys container icon (should be the icon below your bag) - notice the icon is not red anymore.
4. Character will execute the action
5. Once the Action is over the trolley including all contained items is gone from the game, forever.

Idea to fix:

Just drop on the ground, when you try to move a trolley into itself.

Fix the issue that happens due to changing the Trolley Model or whatever is going on - not sure but it seems related to the model change or something along those lines - perhaps some attribute getting lost.

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I did this by mistake and spend like 15 Minutes trying to find out where my trolley went (sometimes I temporary store it in my backpack), until I decided to "-debug" cheat myself a new one and managed to reproduce this bug.