It's even more noticeable/frequent with round laces so that's what makes me suspect you might be a victim of this.
Comparison To Other Regular Shoelace Knots
It was much easier to prove that Ian's Secure Shoelace Knot is more secure than any of the regular shoelace knots. Using a pair of shoes with round, slippery laces, I tied one with my Ian Knot and the other with my Ian's Secure Shoelace Knot. Despite tying both to approximately the same average tightness, the Ian Knot came untied two or three times a week whereas the Ian's Secure Shoelace Knot never came untied.
https://www.fieggen.com/shoelace/secureknottech.htmI've even tried tying his shoes myself (so I know both the knots are pulled really tight, and that the loose ends are the same length as the bows). Even so, somehow the ends get pulled hard enough that they end up undone.
(Somehow for him even the Ian secure knot doesn't guarantee a full day without laces coming undone.)
https://play.google.com/store/apps/details?id=com.nynix.knot...
Would it bother you if I started re-wrote the Wikipedia article on the hot dog in an attempt to convince everyone I invented it? And if people started believing that?
If you've "invented" some relatively simple combination of existing pieces, the only sensible and humble thing to do is acknowledge that you're probably not the first one.
When you pull the two string ends of a standard knot at the same time, the loop shrink and pull out of each other at the same time. Just figure out how to do that backwards and you probably have Ian's Knot or something very close.