Smooth scroll is not apply to ToC list which Korean word included

As I know that smooth scroll is standard in webflow.
However I found that smooth scroll is not working properly with ToC.
When I click ToC list which is Korean word or contain Korean word, it just quickly moves without scroll animation.

I have tested a hundred times with many kind of ToC javascript and many kind of brower and mobile phone… all the same problem.

Here is test link. https://toc-52fd63.webflow.io/


in ToC, 3rd and the last one is not working.