Add() method of the Decals class doesn't work

Hello! Add() method should adds a new Decal to the decals list of an object, but when I run the Add method more than one time I don’t get more than the first added decal (can observe it at Properties > Decals panel of the selected object). Howether, once I had success running absolutely the same script and getting many decals on the object, but don’t know actually how it happened and can’t repeat it anymore

import rhinoscriptsyntax as rs
import scriptcontext as sc
import Rhino
import Rhino.Render as rr

bitmap_texture_type_guid = rr.ContentUuids.BitmapTextureType
bmtex = rr.RenderContentType.NewContentFromTypeId(bitmap_texture_type_guid)
bmtex.Filename = "/Users/vs/Desktop/tex01.png"

params = Rhino.Render.DecalCreateParams()
params.TextureInstanceId = bmtex.Id
params.DecalMapping = Rhino.Render.DecalMapping.Planar
params.DecalProjection = Rhino.Render.DecalProjection.Forward
params.Origin = Rhino.Geometry.Point3d(0,0,0)
params.VectorUp = Rhino.Geometry.Vector3d(0,10,0)
params.VectorAcross = Rhino.Geometry.Vector3d(10,0,0)

decal = Rhino.Render.Decal.Create(params)

obj_id = rs.GetObject("Object", 8+16, True, True)
rh_obj = rs.coercerhinoobject(obj_id, True, True)


The result of the successfully added mutiple decals which can’t repeat again

By the way, the same bug happening with the Remove method when I want to remove decals of an object, it simply does nothing with them

Hi @andy Maybe you can elucidate my suffering. Does the problem described above originate from this reported bug?