Unable to delete pages on tablet.

Hey guys, my computer died awhile back so I've been running my campaign solely from my nivida shield tablet. The problem is whenever I want to reach the delete page button on any extra maps I have the gear button leading me to the option actually just loads up the page, then the option to delete theage informs me it isn't possible while the page is loaded. Any ideas on how to fix this? 

I have exactly the same problem. At the moment, I am archiving the pages to make room and delete them later when I work again with the PC.