Help Please, Dropdown interaction bug?

HI webflow everyone,
I have 2depth structure in navigation bar by using dropdowns.
firstly, it’s no problem when no interaction in dropdown open/close.
however, Sub-dropdown ui will be disappear on hover when interaction applied by dropdown open/close.
I don’t know exactly if it’s bug or not…
It’s very important for me because in order to get big order for big customer this time…
please help me…(I appreciate you reply even custom code)

[1]Share link: Webflow - dropdown-test

[2]Video link: Dropbox - dropdown-test.mp4 - Simplify your life