VO bug in Office Lens on iOS 13

Hi all,
Very recently, when I opened up Office Lens, I noticed that VO no longer announce whether I need to move my camera around.
Previously, before I updated to iOS 13, when using this app VO would announce things like 'move right', 'ready', etc...but right now, on iOS 13.1.2, VO no longer announce those things, which I find to be quite annoying.
Is this a bug with iOS 13, or a bug in Office Lens?

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