If you shift-right-click a card or canvas, and then hit Escape, you are put into box-select mode, which is unexpected.
Sometimes, I use shift-right-click to access the browser’s context menu to enter inspect mode (because normal right-click is overridden to pan tool).
kind of side stepping this,
In the next release, there’ll be a new user pref to disable right click to pan , so you can just get to the browser context menu and inspect things directly (it’s what I use on my dev env)