Comment 1 for bug 1892146

Indeed, deleting the ~/snap folder isn't a reasonable use case, it will break much more than just window tracking (for starters it will remove your entire chromium profile, including bookmarks and navigation history, which you most likely don't want).

That said, I can't seem to reproduce the bug. After deleting the ~/snap folder and restarting chromium, the window is mapped to the launcher icon as expected.

What is the output of the following command on your system?

    gsettings get org.gnome.shell favorite-apps