they do not open, and add the app to 'my favourites' on the sidebar. After searching for a solution to this problem I found a bug report on this issue here: https://bugs.launchpad.net/ubuntu/+source/gnome-shell-extension-ubuntu-dock/+bug/1725384 Apparently touches here register as multiple touches and don't open the apps correctly.
However, the proposed solution, using the command:
fixes this issue but prevents me from logging on after the lock screen as it won't let me input my password, it acts as if I am holding down the enter key.
sudo dmidecode | grep -A9 "System Information"
Manufacturer: Dell Inc.
Product Name: Inspiron 7773
lsb release --all
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04.1 LTS
GNOME Shell 3.28.2