Just wanted to throw this up incase anybody else has seen it.
A number of times when trying to get an LVT on a beachhead, the LVT has pitched up and gotten stuck. After checking it out, I've noticed a pattern:
If you approach a beachhead with Dragon's Teeth, then you can drive up on it, however, if you approach a marshy beach or one that quickly transitions to trees before you see Dragon's Teeth, then you get stuck.
It makes a little sense so I'm wondering if it's a bug or if it's intentional.