After googling I figured out the problem, but it took me probably a month to internalize the new knot (the worst being the 3rd or so phase when the new move becomes natural and you don't have to think about it anymore, but sometimes your brain just flips a 50/50 coin as to whether it'll use the old or the new method).
Even the Ian's knot demo uses an empty shoe. Since I haven't learnt his tying technique, can anyone please say if it works under tension?
In exchange I'll give you a free tip on how to dry your shoes. Remove the insoles and wedge inside a ball of absorbent paper such as kitchen towel for 10 minutes. Remove and then insert a vacuum cleaner nozzle inside. Switch on the vacuum and leave it running for 20 minutes or until dry.
https://www.goodreads.com/quotes/782216-everything-is-intere...