Desktop shortcut disappears from Finder favorites in Monterey, too
Not a question (but perhaps someone has a definitive answer as to why this happens and how to prevent it) but rather a fact: the "Desktop" folder disappears from "Favorites" section in the Finder every now and then. There is no pattern, it may stay there for weeks and then just disappear on a reboot.
Comes back when added through Finder preferences (checkbox by the "Desktop" entry in "Show these items in the sidebar").
This annoyance persists at least since Mac OS Mojave and still happens on three of my fully up-to-date Monterey computers, both Intel and Apple Silicon.
Mac Pro, macOS 12.3