Hello, Sometimes using a gear manager to transfer your items can result in the item being temporarily lost. Since your inventory was full it is might be in your vault. Check all characters and the vault again. Unfortunately, bungie will not replace lost or deleted items. For more information please read their [url=https://www.bungie.net/en/Help/Article/12211]Deleted item and Character policy[/url].
Thanks for your answer! I looked again in my vault and it was there again! But it was lost for a day I think ...
Glad you found it!