No, but for me it often fails when outside in bright sunlight, especially if the sun is low in the sky, as it often is in my latitude. Perhaps it might work better if I try training it on my squinting face.
Sort of the same experience in some specific lighting conditions.
What I found out though is that it's because in such lighting conditions I don't blink, compounded by the fact that if it doesn't unlock I unconsciously keep on not blinking to... see it hopefully unlock! So when this happens I consciously blink and it unlocks immediately, which is kind of cognitively dissonant.
Unknown if that would apply to your situation, YMMV but I thought I'd throw this one out.
There's also a kind of annoying recurring situation where I want to look at stuff on the lock screen but don't want to actually unlock...
I do wish they'd have reintroduced Touch ID in the camera control button sensor (or just in the power button, as for the iPad Air) but I guess cases would cause a problem.
What I found out though is that it's because in such lighting conditions I don't blink, compounded by the fact that if it doesn't unlock I unconsciously keep on not blinking to... see it hopefully unlock! So when this happens I consciously blink and it unlocks immediately, which is kind of cognitively dissonant.
Unknown if that would apply to your situation, YMMV but I thought I'd throw this one out.
There's also a kind of annoying recurring situation where I want to look at stuff on the lock screen but don't want to actually unlock...
I do wish they'd have reintroduced Touch ID in the camera control button sensor (or just in the power button, as for the iPad Air) but I guess cases would cause a problem.