Screen reader skipping focus order items

Hi George - you're right. The screenreader is missing the content because it is not actually on the slide yet. The best way to fix this is to put all the text off the slide with no animation AS WELL as keeping the text on slide. All the text on the slide - uncheck the "item is visible to accessibility tools" checkbox. So the only thing the screenreaders see is the text that is off slide and you have no issue with someone using a screenreader having to wait for the text to fade in. 

Then have you master slide items at the end of the list. Additionally - are you sure you want the master slide items to be visible to the screen reader at all? If its repetitive information that is not improving someone's experience, best practice would be to nix it from being viewed by the screenreader.