I use Microsplat, when I clicked play I realized that the texture of the ground is not sync with the terrain's mesh, but the vegetation spawn at the right height. I have tried many material the the problem is still the same.
To test, I have also generated a terrain mesh and it was "fixed" but off course it get overrides if I generate the terrain again.
https://media.discordapp.net/attachments/475534166608576520/705976050466816030/unknown.png?width=1415&height=677
I use Unity 2019.3.6f1