The enemy object is partly visible when it is activated

[volcank]

I am living a weird issue where when I activate an enemy and make him visible only parts of the 3d model are rendered. I am using a ready asset from asset store which had its own shaders but I also got rid of the shader and deleted the shader folder and created a default material for the enemy but still same problem. I am using Built in Render Pipeline and I am in Unity 2022. I would appreciate you feedback and support on this. The example video is below so you can see the problem.

[Ramen]

Have you tried recalculating the normals for the model? Sometimes when you swap materials or remove shaders, the normals can get messed up.