Screen keyboard improperly appears on laptops with touchscreen

[Jacob]

Release: Ubuntu 18.04.3 LTS
gnome-shell version 3.28.4-0ubuntu18.04.2

Directions to produce bug:
* Install Ubuntu 18.04 onto a laptop with a touchscreen.
* Install uxterm package.
* Upgrade software packages to most recent version.
* Confirm "Screen Keyboard" and "Typing Assist" are disabled in Universal Access.
* Reboot.
* Log in and start "uxterm".
* Switch focus to another window.
* Touch the "uxterm" window.

Expected proper behavior: "uxterm" window gets focus, no other actions.

Actual inappropriate behavior: "uxterm" window gets focus, and screen keyboard appears in defiance of "Screen Keyboard: off" setting and presence of undetachable physical keyboard.

Empirical testing indicates that the screen keyboard doesn't appear for every touch, but seems to appear for every touch to any area that accepts text input, or perhaps for all areas that aren't internally marked somehow as not accepting text.

This is a reappearance of Bug #1723857. The reappearance was noted in comments 61 and 62 of that bug, but apparently ignored because the bug is closed. I am creating this as a new bug per the guidance in 1723857#60: "This bug is closed so if you experience any problem at all then please open a new one." by Daniel van Vugt (vanvugt).

[Sebastien Bacher (seb128)]

Thank you for your bug report, could you maybe report it upstream on https://gitlab.gnome.org/GNOME/gnome-shell/issues ?

[Launchpad Janitor (janitor)]

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

[Jordan Carroll (father-jordan)]

I can confirm that this is affecting me as well, with a Dell P2418HT in Ubuntu 20.04.6 LTS. The on-screen keyboard pops up frequently when using a web browser, usually when I haven't selected a text field.