Launcher Search is showing duplicate icon
Solution 1:
I too had a similar issue. I had two launchers for 'System monitors' in my Ubuntu 20.04. Both the launchers appear to be having different commands to launch but launch the same software. I recognized one having 'snap' in the command line (presumably updated via snap). I sorted it out by using the application 'menu editor', and slid the radio button of 'Hide from menus' to 'on' for the software devoid of 'snap'. Voila! I got rid of two enteries.