I'm also having this issue. (quick reply from lock screen doesn’t work) Does anyone have a fix or replication of this issue?Using the iPhone 7 Plus.
Updated via public release yesterday. So far so good. Minor bugs in messages (quick reply doesn’t always work), 3D Touch is quite laggy. Battery life isn’t horrendous, but I do lose battery life faster in comparison to 10.3.3.
I’ll update later this evening with further findings