When using an app, you may on occasions find that VoiceOver focus will spontaneously ‘jump’ to the first element on the screen.
This behavior has been reported as most common in Safari and the native News app, but has been encountered in many other apps.
As far as we can determine, there appears to be no pattern to this behavior or a reliable means of reproducing it.
It also appears that users encounter this behavior at varying levels. For some, it is very occasional, for others it makes using some apps an extremely frustrating experience.
View this forum topic for more discussion of this bug: https://www.applevis.com/forum/ios-ios-app-discussion/vo-skipping-top-after-ios-1211-update