I use an iPad mini 2 and I have been noticing something. I use Alex as my Voice Over voice and it sometimes will not talk. For example, let's say you are reading something on this website and everything is fine until suddenly Alex will stop talking but the sounds will keep playing. A way to fix this is by restarting Voice Over. Have any of you experienced this? By the way I have seen this with iOS 11.2.5 and 11.2.6.