If you're sure that show-mounts is set to false then the next step I would recommend is to see if the parent project has the same bug:
sudo apt install gnome-shell-extension-dashtodock and then use the Extensions app to disable Ubuntu Dock and enable Dash To Dock. If the same bug is seen there then it should be reported to the developers at: https://github.com/micheleg/dash-to-dock/issues ** Changed in: gnome-shell-extension-ubuntu-dock (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1943342 Title: Several seconds for icons to appear and dissappear from the dock To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell-extension-ubuntu-dock/+bug/1943342/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
