Shea is back at the Britannia after being sent home three weeks before his loan spell at Barnsley was due to end.
The decision to return him came after the 24-year-old winger upset Barnsley fans after he gestured towards one supporter at the end of a recent 5-0 loss at Huddersfield.
Shea told The Sentinel: "I had an altercation with a gentleman and I think the fans took it that I had a go at the club, but I was only frustrated with one guy. I'm over that and happy to be back at Stoke.
"At the time I was upset, but now I've left it behind me. I can't really change what happened.
"The passion of the fans over here is crazy, in a good way, but when things don't go their way they are upset with their players and that can get out of hand."