UserAgent: Mozilla/5.0 (X11; CrOS x86_64 10895.78.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.120 Safari/537.36
Platform: 10895.78.0 (Official Build) stable-channel cave

Steps to reproduce the problem:
1. Flip your Asus to tablet mode
2. Open a PDF document using Doc Hub from your Google drive
3. Try to scroll down and scroll up across the document

What is the expected behavior?
That you can move across the document by sliding your fingers on the screen. 

What went wrong?
You will see that as soon/as you touch the screen to scroll down through the document, the keyboard keeps showing up on the screen even though you just want to read the document and there is not possible to modify it. Therefore you are forced to use your Asus in laptop mode and use the trackpad to move across the document. In definitive, the keyboard shows up even when no action taken required it to show up. Really annoying, specially when Doc Hub is your fave app to read PDF.

Did this work before? N/A 

Chrome version: 69.0.3497.120  Channel: stable
OS Version: 10895.78.0
Flash Version: 31.0.0.108 

I love my Chromebook and Google, so please solve this issue ASAP