Hmm weird, I will look into that one! Were you playing on mobile via touchscreen or using a mouse?
Thank you for the feedbacks, always help us a lot to improve !!
Laptop with a mouse. It almost seemed like if I was fast enough placing it down I could double my score. I played through the game twice to make sure and was able to beat level 6, 7, and the final level with less than the required number of cards and going over the target score. Weirdly enough I couldn't get it to work with level 8 though. I did a bit more testing, It almost definitely feels like a timing thing.