RE consistently overflows horizontally despite max width set to 100%

I have a navbar in a RE that consistently overflows on mobile. However, in the responsive preview in Bubble, it behaves as expected for the mobile breakpoints.

All of the items within the navbar that are deisgned to be hidden in mobile are set to collapse, and all of the items that are set to be visible in the mobile view have a max or fixed width of 100% and the ‘fit width to content’ box is unchecked. The RE on each parent page has a fixed width of 100%. I’ve noticed that even when I reduce the overall width within the RE itself, on the parent pages it still overflows the page on mobile.

Is there anything I may have overlooked?