@jamesh your stack trace is caused by Ubuntu Dock's dynamic transparency which I mentioned before in Comment #17 and can be disabled with the following terminal command:
gsettings set org.gnome.shell.extensions.dash-to-dock transparency-mode FIXED
@jamesh your stack trace is caused by Ubuntu Dock's dynamic transparency which I mentioned before in Comment #17 and can be disabled with the following terminal command:
gsettings set org.gnome. shell.extension s.dash- to-dock transparency-mode FIXED