why Unity 2019.1 scrollrect is not working if NGUI UI Root object present in scene

I just upgraded unity to latest Unity 2019.1.9f1 & unity’s scrollrect is not working if i have NGUI UI Root object present in that scene…

Steps to reproduce:

  • Create new project
  • Import NGUI & add its game object to scene
  • Create a scrollrect inside canvas.

In editor everything is working fine but after building to android, in mobile device unity’s scroll is not working…

Is this unity bug or what?

In my case, I have two scene(UGUI, NGUI)
a bug which i facing is,

  1. build android apk
  2. enter ngui scene. and click even number count(include exit button click)
  3. enter ugui scene.
  4. evenything is ok, but all ScrollRect is not working

maybe is relate with UICamera. If uncheck touch in UICamera, this bug cannot be generated…

I am facing same problem