I have been using my Pebble 2 HR with both Voice and Canned text replies for quite some time (iOS). Today I tried a test to help another with a new Pebble 2 on this forum and found that mine has also stopped working. The only thing that has changed is a VERY recent update to iOS 11, then 11.1,11.2,11.3 in quick succession. The other Pebble 2 user was also using a iPhone 6, like me.
First it would be nice to know if this problem is iOS 11 related or if there is something going on with the iPhone 6 / iOS 11 combination (which I seriously doubt). If you have recently upgraded to iOS 11 please check to make sure you can still use Voice.
An additional note. It seems that occasionally something happens, either with my watch or with my phone. that causes Maps notifications to not work … usually for a short time. The update to iOS 11 also caused my Maps to cease ( things like “8.2 miles to home” or “4.6 miles to the gym”, etc). That didn’t surprise me too much because most of my apps updated to new iOS 11 compatible versions. But’s been a week or two now and the Maps app still isn’t sending any notifications. This may be another problem with the iOS upgrade.