If it is inside for sure and you checked the shaft attachment to see its tight, then the only access inside the head is the weight in the back. The hole there is small so the chances of something shaking out of there is slim. You can bring it to a club repair shop and see if they can inject hotmelt inside to catch perhaps debris from manufacturing.

Do not think it is a manufacturing issue. The club came out in 2014 and it is five years old. Most likely has taken a pounding at the store from folks trying it. Demo also means that some have probably checked it out and taken it to course to play with to try it out. Sometimes you can get some good deals on demos and of course you purchase them as is. If it has set in a garage the year round could be some glue melted and in the head. I would also recommend taking it to a repair shop and ask their opinion on what might be wrong and a solution. Very hard to speculate regarding the issue on social media. Best of luck. That was a very good driver. I still have mine as a back up.