Could you please measure it again after a few weeks? The disc changes slightly with use, it might get quicker. You can break it in quicker if you overheat it slightly with an empty bowl a few timesJust measured: my second cooldown click takes 17min after the first one - no magnets involved no cooling stand.
Yes it can get stuck and you’ll need yo pull up the springCan this alter the VI functionning, decalibrate it or something ?