Dcc.loading symbol position with dash pages page_container

Hello there, I am using the the loading symbol for the main page container of my multi-page app as follows:


Issue I have is some pages are more than twice the height of the vertical screen size and therefore you can’t seee the loading symbol unless you scroll down the page. The default position seems to be in the center of the page container.

Is it posible to alter this loading symbol position such at the top of the page container?

Thanks, Richard

Is this not possible?