Ok, I tried the slave window thing. It seemed normal for a few minutes, hitting the back button going back to my place on the page. Then it started opening the slave window, as it should in regards to that setting. While that works, it is still somewhat cumbersome. I went back to the previous setting and my problem came back. So, it is not a problem 100% of the time, it seems.
It has to do with a forced re-load I think. . . I’ve seen it happen too. Check and see how many apps you have loaded on your iPad and close most of them. I have 128GB of memory so I don’t see it happen too often.