Had a look on a desktop browser (vs iPad) and there something going on with the css I think. There is a link half underneath the svg for your jigsaw series with 0 opacity thus still clickable, especially with touch devices. The usual rhs pane is also affected/missing too? Maybe 5 × 5 is just too wide? I'm sure you'll be able to adjust things :o)
2 minutes later... That's all fixed! I have to suffice with 4 columns, although I preferred the look of 5!
Congratulations on just passing 250k and hopping up another spot on the board! Good stuff :o) 🎉👍