I am not sure if this is a bug but when on get into fullscreen mode (or text view mode) with a folder with some texts in it they will displayed one after another seperated by a border and one can jump from text to text via setting cursor with mouse or using the arrow keys (that is fine and a cool feature).
But with page down or page up one will get to the end of the current text (to the next seperating border) directly instead of stepwise (should be one screenhight after another like it does when one opens just a single text instead a whole folder with more than one text imho) and one cannot jump over this borders with page up or page down, too, what makes navigate a little bit fumbling (is this the right english word?) sometimes.
Fullscreen mode with more than one text let scrivener quits with a “standart error message” very often. The more texts in the folder the more often it quits.
(Sorry, hopefully it is understandable. My english is not very good)