1. Click on the cover of the book, you will see nothing but the background. 2. Change the size of your browser-window and the content will appear 3. You can maximize the window again and everything works fine.
Yes, unfortunately. Most of it is because of Chrome architecture - a new process is created for each tab and it takes a while until that process gets data from the background process. For some things waiting that long is not an option, so you have to do without any of the filter data.