The default key bindings for Mac OS to move "Insertion Point to Previous Word" or "Insertion Point to Next Word" don't work: the pointer stays where it is.
I edited the settings from the default ones, pressing the ⌥ key + direction arrow (which produces ⌥+⌥→ / ⌥+⌥← instead of ⌥→ / ⌥←) and noticed that this fixes the issue for a while, until the application is restarted or the Mac logs out.
Sorry for the delay.
This is unfortunately something that has been reported lately by macOS users. It is most probably related to Java and we are eagerly awaiting a fix.
Once we have a working solution we will let you know.