Ground from tilemap of planes. Object jerks while move

I have a ground made of tilemap. Object with rigid body moving and freezes sometimes when transfering from one tilemap to another. I dont know what kind collider i should use for tilemap. Very hard search in internet - no result.

Was this made with the Tilemap component somewhere? I’ve never seen the individual tiles show up as gameObjects like that.

Usually with Tilemaps you will have a TilemapCollider2D and then a CompositeCollider2D. The CompositeCollider2D merges all of the tile colliders into a single polygon so that there are no discontinuities.