Scrollbar Style Not Always Applied

I have an electron app that uses multiple windows. I mostly (only?) have seen this in windows. When I run the app in development (webpack dev server), I see all the scrollbars show up correctly, but when I run the app after packaging, I see that some of the scroll bars show up correctly and some show up looking like old windows scroll bars. 02%20PM
Anybody have an idea why this is happening? Closest thing I’ve found is this bug from atom which suggests it’s a load order issue. Either way how to fix please?

nevermind I realized this post is not nearly enough info to debug, and doesn’t really make sense, moderator, can you please delete this?