Can cause problems while appearing to satisfy the desire for responsiveness. For example, on the iPhone: recent messages or calls may update in the middle of a

Can cause problems while appearing to satisfy the desire for responsiveness. For example, on the iPhone: recent messages or calls may update in the middle of a touch, so the location of the input (thumb) actually initiates a call or brings up a thread not intended by the original display. Showing what had been, and then updating the action of a display location, creates a UX of "shifting sands". Often annoyingly occurs with popup ads, but in an iOS app itself is inexcusable.