I love the product - have it for iPad - but have been running into a recurring issue that’s now getting frustrating. When writing in text files, the screen sometimes fails to scroll, so that my writing disappears under the keyboard. Scrolling with my finger just causes the text to rubber band up so that I can see it, then snap back down out if view. I used to take care of it by switching to a different item, then switching back, but that’s working less and less. Any idea what’s going on?