You will find on occasions that VoiceOver focus will spontaneously jump to another UI element.
This particular bug has presented challenges in checking and documenting due to its varying impact on different users. While some have been unaffected by this issue, others encounter occasional instances or, in more severe cases, frequent occurrences rendering their device nearly impossible to use at times. A further complication is that no consistent pattern has emerged regarding the circumstances under which this behavior manifests. For some people, the issue exclusively occurs within Safari, while for others, it can present itself across any application. Similarly, the focus might jump to the top of the current screen for some, whereas for others, it will jump anywhere within the same screen.
This behaviour can often result in the wrong UI element being activated, as there are times when focus jumps as you are in the process of performing a double tap.
Examples of where this has reported to have caused issues include:
- On the recents tab of the Phone app it can result in calls being made to the wrong number.
- In shopping apps it can cause the wrong product or quantity to be added to the shopping basket.
- It can cause the wrong music to be played.
- It can cause the wrong setting to be changed or an option to be set wrongly.
These are just examples. There are many more situations where the spontaneous movement of VoiceOver focus can cause problems or simply provide a poor user experience.
The following forum topic provides some further information and experiences: Here Is Apple Accessibility's Latest Statement On The iOS Focus Bug