Dash to Dock allows the Ubuntu Dock to display itself. This happened when I upgraded to Ubuntu 20.10, with Gnome 3.38. See screenshot

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Actually, I'm not sure about the Ubuntu dock thing. All I know is I have two docks visible in the overview, when I should have only one at the bottom. Restarting Gnome (via Alt-F2 -> r) fixes it until I lock the screen. When I unlock, I see the problem again.
Same thing happening to me in the same ubuntu version. Right clicking the Show Application icon reveals that one dock corresponds to the dash to dock extension and the other one to the ubuntu dock.
Actually, I'm not sure about the Ubuntu dock thing. All I know is I have two docks visible in the overview, when I should have only one at the bottom. Restarting Gnome (via Alt-F2 -> r) fixes it until I lock the screen. When I unlock, I see the problem again.
Same happening to me. Ubuntu version 20.04
Any solution to this? is it possible that after screen lock is enabling the Ubuntu dock?
The left one should not be Ubuntu dock. It seems it's default dash of GNOME
The solution I did was to disable the Ubuntu dock
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Actually, I'm not sure about the Ubuntu dock thing. All I know is I have two docks visible in the overview, when I should have only one at the bottom. Restarting Gnome (via Alt-F2 -> r) fixes it until I lock the screen. When I unlock, I see the problem again.