iPhone using voiceover moves off screen, cannot press button

I have run into a baffling behavior using VoiceOver. Basically when using the "swipe forward" gesture on a screen, the cursor will run off the bottom of the screen and the view will not "move" with it as it should. Worse of all, I have a button down there that is not activated by a double tap when this behavior exists.

What I can gather is that this only seems to happen on two screens, both of which feature customized appearances of the cells in a table view.

I have tried manipulating the accessibilityFrame property of these cells and these table views. I have gotten nowhere. I have tried setting the accessibilityFrame property of the cells as they are made but there was no change in behavior.

Has anyone encountered this behavior? Any ideas for trying to ta开发者_高级运维ckle this problem?

I've seen it, but it's not a problem, at least not in my app -- you can double-tap anywhere, not just on the button. (In other words, a blind user won't realize this is going on, because it just works.)