normally:

You can customize the button offset or disable it in the client config.

yeah but it cant be fixed with that... since its the same x and y but the inventory is moved on the right when that page is opened... u should make it so that it calculates the distance and adjusts it properly..

Currently It does adjust properly within the vanilla context. That window is another mod's and is out of my control. I will still see what I can do. In the meantime you can disable the button.