Google Chrome : 55.0.2883.91 (Official Build) (32-bit)
OS: Android 5.0.02; LG-D801 Build LRX22G
JavaScript: V8 5.5.372.32

When I've swiped up the mobile-friendly view and am reading a page, sometimes things happen that make me put my phone down and/or press the power button to turn off the screen.  Someone comes over to talk to me.  I remember something I must do on the computer.  etc.  When press the power button again to wake up my phone, the mobile-friendly view is gone.  I'm back viewing the regular web page.  Ugh.

Related issues that make this behavior worse:
* This would be less bad if at least the regular page that I'm kicked back to is scrolled to the section that I was reading before.  Instead, it's always at the top, losing my place.
* Also, in the regular view, there is no "Make page mobile friendly" infobar at the bottom.  To get back the ability to read the mobile-friendly view, I have to reload the page.  (And reloading the page is a problem if I'm somewhere without a data connection...)