UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/49.0.2623.108 Chrome/49.0.2623.108 Safari/537.36

Steps to reproduce the problem:
1. Open a new tab and open the Developer Tools here.
2. Focus the Console tab in the Developer tools.
3. Open the autoscroll-fail.html file (in an attachment) in this tab.
4. See the console.

What is the expected behavior?
The scrollbar should be in its bottom position so you should be able to see the last log.

What went wrong?
The scrollbar is not in its bottom position. It stops autoscroll at some position and this position is not the same for every try.

Did this work before? Yes about 3 monts ago

Chrome version: 49.0.2623.108  Channel: n/a
OS Version: 
Flash Version: Shockwave Flash 11.2 r999

It seems there is no problem when logs are not multiline: when you try the same scenario with the autoscroll-ok.html file autoscrolling works correctly.
 

Deleted: autoscroll-fail.html 156 bytes

autoscroll-fail.html 156 bytes View Download

Deleted: autoscroll-ok.html 108 bytes

autoscroll-ok.html 108 bytes View Download