[Closed] Scripted Edit Normals modifier plugin and replaceUI problem

I’m trying to create my scripted modifier plugin, which is based on Edit_Normals modifier.
The problem is when I disable original properties rollout, by setting replaceUI to true then the base modifier seems to stop working.

Here is an example:

plugin modifier editNormalsTest
name:"Edit normals test"
classID:#( 41556273, 24456704 )

extends:Edit_Normals replaceUI:true version:1
(
	parameters main rollout:myParams
	  (
		display type:#boolean ui:display_chb default:false
		
		on display set val do this.delegate.displayLength = ( if val then 10 else 0 )
	)

	  rollout myParams "my parameters"
	  (
		checkbox display_chb "Show lines"
	)
)

It going not work, until replaceUI is set to true.

I have his problem under max 9 and 5.