Portfolio- Random scroll bar pops up in my navbar and disappears

Portfolio- Random scroll bar pops up in my navbar and disappears
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#1

I’m working on my portfolio page and this code:

data-toggle=“collapse” data-target=".navbar-collapse"

is causing a horizontal scroll bar to pop up and disappear on my navbar when my "about " section button is clicked on in desktop mode. It’s driving me nuts. Does anyone have an idea why it’s doing this?