Vanish Mode Not Working on Document only on M4 iPad Pro 13

Hi there,
I have many different iPads and use MN4.
I have no idea when the error started on my M4 iPad Pro 13inch for using MN4.
Using Apple Pencil to write with Vanish Mode on Document on MN4 became not working.
Vanish Mode on MindMap is fine. However, My iPad mini 6th Gen for using MN4 has no problem writing with Vanish Mode on MN4 on any documents.
The problem only occurs on my M4 iPad Pro 13inch.
I have tried turning the iPad off and on and even I reinstalled the MN4 but it hasn’t been solved.
I emailed to MN4 Support but I haven’t got any reply.
Does anyone have the same problem on your M4 iPad Pro???
Please help me out.

Thanks,

Hello

Thank you for your feedback. Your problem have been submitted to the development team.

Kind Regards,

Support Team