I discovered some blemishes on the freshly installed Linux Mint 21 Cinnamon.
It might just be related to my Asus notebook.
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Scenario 1:
- Click and HOLD the left mouse button -> Any file or folder (Nemo or Desktop) OR click on an empty area of the desktop OR click on an empty area or a button within a program.
- Click and release the "superkey" ("windows key" or "tux-key") (Cinnamon main menu opens.)
- Now release the left mouse button.
Scenario 2:
- Right-click and release on the desktop (regardless of whether it is an empty area or an object).
Scenario 3:
- Left click on the calendar OR the battery icon OR the volume control OR the network icon OR the eject icon OR the notification icon in the taskbar and release.
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I will update the list as soon as possible. There are similar "problems" related to right mouse button clicks in combination with the FN key and some minor blemishes in Explorer (Nemo).
It might be related to my laptop. Maybe someone can confirm that.