gedit random paste highlighted text while scrolling

[Federico]

my system:
Ubuntu 14.04.2 LTS x64 (updated)
Release: 14.04

apt-cache policy gedit
gedit:
  Installed: 3.10.4-0ubuntu4
  Candidate: 3.10.4-0ubuntu4
  Version table:
 *** 3.10.4-0ubuntu4 0
        500 http://it.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
        100 /var/lib/dpkg/status

reproducing bug:
0) open a ~400 lines text file
1) highlight some text (e.g. a single line in the middle)
2) scroll till the bottom of the document (using the mouse wheel)
3) scroll till the top
4) Type Ctrl+C then Ctrl+F and finally Ctrl+V (or manually search for the same text in the document)

you will notice that the highlighted text will be copy-pasted randomly in your document.

if you can't reproduce the bug this way, try opening a 400 lines .py (python) text file (UTF-8 encoded) with python code inside it.

EDIT:
Bug confirmed with normal text files also (see comment #4)

[dinamic (dinamic6661)]

i don't have a 400 lines .py (python) text file (UTF-8 encoded) with python code inside it :>

can you upload/link to one?

[dinamic (dinamic6661)]

random .py (for test)
can't reporduce the bug on Ubuntu 15.10, gedit 3.10.4

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Federico (federicop)]

Bug confirmed with normal text files also (attachment added)

Steps:

1) highlight some text (e.g. a single line in the middle)
2) scroll till the bottom of the document (using the mouse wheel)
3) scroll till the top
4) Type Ctrl+C then Ctrl+F and finally Ctrl+V (or manually search for the same text in the document)

[Sebastien Bacher (seb128)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. The issue you are reporting is an upstream one and it would be nice if somebody having it could send the bug to the developers of the software by following the instructions at https://wiki.ubuntu.com/Bugs/Upstream/GNOME. If you have done so, please tell us the number of the upstream bug (or the link), so we can add a bugwatch that will inform us about its status. Thanks in advance.

[Norman Perelson (simplr)]

I still experience this bug. Using Pluma in Ubuntu Mate 19.10