A1519827687133, Jun 14, 2019 : Hi team, I am facing an issue in one plus 5t phone with OxgenOS version 9.0.6. When I am making or receiving any call, all buttons like speaker, record, mute, keypad button not visible on the screen. Even button to cut the call is also not visible. Then I restart my phone, it works fine for some hours. But again facing the same problem. I restarted my phone around 5 times in a day. Don't know it's a OS issue or some other problem. Please help and share if any one facing the same problem.