I've noticed lately that when I place a call, immediately after it dials it the screen goes black before I even put the phone up to my face (and no, I'm not covering the sensor). And after I end the call and pull it away from my face it remains blacked out. I have to actually slide the keyboard open to get the screen t wake up so I can either end the call when I'm done, or if I want to use speaker. I did a search and some people are experiencing the opposite where the screen stays on and they end up pushing buttons with their face. Anyone else experiencing this issue?