I used the nestable nav element alone and the icon transitions work fine in this element. But when I put the dropdown inside a nestable nav, the icon transition doesn’t work at all and it always defaults to transition: 0.4s; Is.
Even icon transition in nav nestable > dropdown > icon transitions can’t be controlled.
As you can see in this test website, there are two dropdowns in the header. But I can’t control the transition for the icon of those two elements at all. When I remove the dropdown from the nestable nav element and use it independently, there is no problem and the transition is well controlled.
I didn’t have enough time to take a video now. Please let me know if you are still not successful in reproducing this bug and I will record a full video for you tonight.