Ten days after upgrading to iOS 15.6.1, VoiceOver stopped speaking. The gestures still work, and I get haptic feedback but nothing else. However, if I'm on a phone call, Voiceover works normally until the call is ended.
Also, if I ask Siri a question, I can swipe over the screen and here VoiceOver read any text that is present. But, if I try to switch to an app, VoiceOver stops speaking again.
In case it was some sort of resource issue, I've closed all apps. I've also rebooted the iPhone and, with great difficulty, managed to unlock the iPhone after the reboot. Still, the problem persists.
Unfortunately, I don't have any headphones to determine if the problem is isolated to the builtin speaker or not.
I contacted Apple about the problem, but at that time was not aware that the problem would disappear when on a call. So, Apple was not able to find anything.
Has anyone seen this problem, or are there any suggestions to solve the issue?