[1.15.2] Scroll button not working

List scroll button not working in my Scene. As an example, I took "ModListSceen" and did everything the same as there, but when I click on the scroll bar, nothing works. Please, help.
Here is my code:

public class EntityListWidget extends ExtendedList<EntityListWidget.Entry>{



    private final ResourceLocation img = new ResourceLocation(ArchitectsDream.MODID, "textures/item/dark_dust.png");

    //private final int listWidth;



    public EntityListWidget(Minecraft mcIn, int width, int height, int top, int bottom) {

        super(mcIn, width, height, top, bottom, mcIn.fontRenderer.FONT_HEIGHT * 2 + 8);

        //this.listWidth = listWidth;

    }

    public void addEntryTo(String str){

        addEntry(new Entry(str));

    }

    public class Entry extends ExtendedList.AbstractListEntry<Entry> {

        private final String text;



        public Entry(String text){

            this.text = text;

        }

        @Override

        public void render(

            int entryIdx, int top, int left, 

            int entryWidth, int entryHeight, int mouseX, 

            int mouseY, boolean p_194999_5_, 

            float partialTicks

        ){

            minecraft.fontRenderer.drawString(text, left + 2f, top + 2f, 0xFFFFFF);

            //AbstractGui.blit(getLeft() + 10, top + 20, 0, 0, 16, 16, 64, 16);

        }

    }

}

I also initialize and render my list. It's worth noting that scrolling the mouse wheel works.