diff --git a/scene/main/viewport.cpp b/scene/main/viewport.cpp
index 621d5f765bc..3ac1a0eaf01 100644
--- a/scene/main/viewport.cpp
+++ b/scene/main/viewport.cpp
@@ -396,14 +396,15 @@ void Viewport::_notification(int p_what) {
 #ifndef _3D_DISABLED
 				PhysicsServer3D::get_singleton()->space_set_debug_contacts(find_world_3d()->get_space(), get_tree()->get_collision_debug_contact_count());
 				contact_3d_debug_multimesh = RenderingServer::get_singleton()->multimesh_create();
-				RenderingServer::get_singleton()->multimesh_allocate_data(contact_3d_debug_multimesh, get_tree()->get_collision_debug_contact_count(), RS::MULTIMESH_TRANSFORM_3D, true);
+				RenderingServer::get_singleton()->multimesh_allocate_data(contact_3d_debug_multimesh, get_tree()->get_collision_debug_contact_count(), RS::MULTIMESH_TRANSFORM_3D, false);
 				RenderingServer::get_singleton()->multimesh_set_visible_instances(contact_3d_debug_multimesh, 0);
 				RenderingServer::get_singleton()->multimesh_set_mesh(contact_3d_debug_multimesh, get_tree()->get_debug_contact_mesh()->get_rid());
 				contact_3d_debug_instance = RenderingServer::get_singleton()->instance_create();
 				RenderingServer::get_singleton()->instance_set_base(contact_3d_debug_instance, contact_3d_debug_multimesh);
 				RenderingServer::get_singleton()->instance_set_scenario(contact_3d_debug_instance, find_world_3d()->get_scenario());
-				//RenderingServer::get_singleton()->instance_geometry_set_flag(contact_3d_debug_instance, RS::INSTANCE_FLAG_VISIBLE_IN_ALL_ROOMS, true);
+				RenderingServer::get_singleton()->instance_geometry_set_flag(contact_3d_debug_instance, RS::INSTANCE_FLAG_DRAW_NEXT_FRAME_IF_VISIBLE, true);
 #endif // _3D_DISABLED
+				set_physics_process_internal(true);
 			}
 
 		} break;