Grass landscape completely covering some road splines

Hello,

I am creating a map in uefn as a first time creator and have been learning as I go- but I cannot find the answer to this issue I am having. Most of the road splines are fine but in some areas the landscape covers the roads (the mini map shows this as well while launching a session). I checked my Nanite setting and it was turned off as a failed attempt to fix the issue. Any help is greatly appreciated!

4 minutes in for your specific issue but the whole video is good

Thank you @KeyserScholze!

Thanks for the recommendation! The video was useful and it has fixed my issue!