So i think i found my issue which is indeed a bug imo
I have an underground volume in a certain area as the player can go under the map now as the volume was pretty bug it went into the area that you could go through with the truck. Now that area the truck went through has no cut outs ect so it should be constant solid with collision even if there is an underground volume going through it or thats how i think it should work.
I have changed the size of the volume and o far in a session i cannot glitch under the map so i will publish and do more tests but i think that was the cause of my issue.
I believe regardless of having an underground volume it should not disable collision on a landscape piece. As far as i know you have to cut the landscape so it has a hole then the underground volume only ensures the player will not get eliminated but i think in my case the underground volume is actually negatively impacting landscape collisions