UserAgent: Mozilla/5.0 (X11; CrOS armv7l 8743.85.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.101 Safari/537.36
Platform: 8743.85.0 (Official Build) stable-channel veyron_minnie

Steps to reproduce the problem:
Setup details: 
===============
Device: ASUS Chromebook Flip C100PA
Chrome OS Version: 54.0.2840.101
Android OS Version: Android_6.0.1

Steps to reproduce: 
====================
Pre-condition:
1. Enable Chromebook Unified Desktop Mode.
2. External Monitor is connected.

1. Launch Google Play store.
2. Disconnect HDMI cable.
3. Re-connect HDMI cable.

What is the expected behavior?
Mouse's layout displays as expected.

What went wrong?
Mouse pointer is missing within all Android client window.

Did this work before? No 

Chrome version: 54.0.2840.101  Channel: n/a
OS Version: 8743.85.0
Flash Version: Shockwave Flash 23.0 r0

In unified desktop mode, touch doesn't work ARC++ apps. Once this issue occurred, the only way to fix it Sign out the OS and re-login.