Same issue here. It broke in one of my apps. My index is one off. I tagged a button in the cell on cell creation, the tag is correct, the index path being returned when the button is tapped is not.

I know this is an older thread but Apple really needs to rethink this API, it's very very messy, the sample code doesn't match what's covered in the WWDC video, and it's absolutely infuriating to work with if you want any kind of customization. I shouldn't have to create a diagram based on the comments above (which are way more helpful than the docs or WWDC video) just to get a basic custom cell to work. Yikes.