Issue with alb_custom_layout and comments zone

Hi team,
I’ve an issue with comment zone / block element when this element are calling in an alb_custom_layout element :

• If the comments element are calling directly on my page, it work perfectly : the comments are displaying and you can answer
• If the comments element are calling in an alb_custom_layout element, it don’t work correctly : the comments are displaying but the answer is closed

What’s wrong with it?

Thanks by adavance for your help!
Regards,
Marc