App Version: 62.0.3202.27 beta
iOS Version: iOS 11.0 
Device: iPad Pro 12’5

Steps to reproduce:
  1. Launch app in landscape mode.
  2. Go to browsingtest.appspot.com/koala.html and tap on email link there.
  3. When taken to the compose email screen in mail app, dismiss or send an email.
  4.Now change  the device to portrait mode and go to browsingtest.appspot.com/koala.html and tap on email link there.


Observed results:
Compose email screen in mail app is elongated.

Expected results:
Compose email screen in mail app should not be elongated.


Number of times you were able to reproduce: 5/5
Bug reproducible after clean install: Yes
Bug reproducible after clearing cache and cookies: Yes
Bug reproducible on Chrome Mobile on Android:NA 
Bug reproducible on Safari/Firefox: Firefox: No, Safari: No
Bug reproducible on current stable build (App Version, iOS Version): No- M61(New Feature)
Bug reproducible on the current beta channel build (App Version, iOS Version):Yes-M62
Screenshot: 
https://drive.google.com/a/google.com/file/d/0B6GVWQnhaMClaFlqci1wc25pX00/view?usp=sharing