Drag and drop not showing layer

Hi Maria,

Thanks for your swift reply. There are no feedback layers attached because I made custom feedback layers (which I didn't screenshot, sorry). My file is too big to attach, even after omitting a lot of slides that are irrelevant for the issue. Should I email/wetransfer it to you?

The reason I didn't adjust the built-in feedback to my needs is that there are three outcomes instead of two: you get it correct the first time (10 points), you get it wrong (minus 5 points), you try again and you get it correct (8 points). You can only go to the next slide by clicking a button on one of the 'correct' layers. 

(I removed the +8 option because of the issues described, hoping it would solve the issue, so the third option is now no longer present in the file.) 

The weird thing is, I did exactly the same in the second interaction, but there it works just fine.