Terrain not rendering properly in AR

Hi

Im using Unity 2021.3.24f1 along with URP. I have created a terrain and added 5 terrain layers to it. So when I place the model infront of my AR Camera inside of unity and then build the project…The terrain renders perfectly…

But when I try to instantiate it by adding either a button or tap event (using code) to instantiate the model. The model gets rendered flat (No mountains rendered…Only the textures (grass, rock etc.) are visible)

Upon unchecking “Draw instanced” in the terrain settings, the terrain was then visible but none of the textures/Terrain Layers got rendered properly…

Can someone please help me with this issue?
Is it because I have added 5 Terrain layers (more than 4) along with URP?
Im using AR Foundation and my target device is Android…