In editor/canvas, hold Z to activate Zoom mode, do your zooming (eg. draw a rectangle of a part of the canvas you want to zoom into), then release Z to exit Zoom mode.
Sometimes it does not exit and you’re stuck with the magnifier mouse pointer. Even pressing V (Move mode) does not work and you have to go to the menu at the top and force the Move mode there (although the menu says it’s already in Move mode).
Any clue anyone? It’s not consistent as far as I understand…
Note that my Keep tool selected after use setting is off.