Hi there! Thank you for the feedback and sorry for taking so long to get back to you. The 2/3 seconds where the song grinds to a halt before the fail menu pops up is more of a style choice. I feel it's a better transition than just stopping the song immediately and popping the menu up and I don't think it wastes too much time (it should be exactly 2.5 seconds).
This is something we will bare in mind going forward however and if it feels too obstructive/time wasting we will change it :)