Ever since I started upgrading to leaks I'm noticing a lot of proximity sensor issues. While on a call I would mute and hang up on people. It happens with both Z30 and Q10, and it's really annoying!
No issues with sensor on the Z10.
It was brought up by many users in the leak forum though. Perhaps more research into bugs before installing a leak in the future?
I'm running 10.2.1.1055 on a Z30 and the proximity sensor is working great for me. Now, I was fortunate enough to have that leak drop right as I got my phone so before I did anything else on my phone (device migration, settings changes, etc) I loaded up the leaked OS so I may not be a representative case.