This tradition has been transmitted by a different chain of narrators with a different wording, the last in the chain being the same narrator, (i. e. 'Abdullah b. Mughaffal), who said:
A bag containing food and fat was thrown to us. I lept forward to catch it. Then I turned round and saw (to my surprise) the Messenger of Allah (ﷺ) and I felt ashamed of my act in his presence.