Chrome Version       : 51.0.2704.106 (Official Build) (64-bit)
URLs (if applicable) : all
Other browsers tested:
  Add OK or FAIL, along with the version, after other browsers where you
have tested this issue:
     Safari:
    Firefox: OK (46.0.1)
         IE:

What steps will reproduce the problem?
(1)Press Thinkpad's middle mouse button, perhaps to open a link in new tab (the physical button just above the touchpad)
(2)Attempt to perform 2-finger scrolling on touchpad
(3)

What is the expected result?
View scrolls from current position

What happens instead?
View jumps to top

Please provide any additional information below. Attach a screenshot if
possible.
Thinkpad X220T running ubuntu.

$ uname -a
Linux wintermute 4.4.0-30-generic #49-Ubuntu SMP Thu Jun 30 20:51:32 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

Please also note:

-performing the same action in firefox, pdf viewer, notepad, etc does not cause this behaviour
-opening a new tap with "3-finger tap" does not trigger this bug