App Version: 63.0.3215.0
iOS Version: iOS11
Device: iPhoneX Sim
URL: NTP 

Steps to reproduce:
  1. Launch app
  2. Open new tab and conduct a web search for Hello
  3. Tap "More about Hello" to enter immersive
  4. Tap browser back button
  5. Repeat steps 3 and 4 until shift in content and overlap is observed.

Observed results:
Moving back and forth in immersives on SRP shifts content to left and overlaps with camera and sensor mode on iPhoneX

Expected results:
Moving back and forth in immersives on SRP should not shift content to left and overlap with camera and sensor mode on iPhoneX. This doesn't occur in iPhone7 on iOS 11.

Movie: https://drive.google.com/file/d/0By4O1f2IQqQ_MUVhb2N2Tkg3Wjg/view