I’m running Pi 3B with an up-to-date version of OSMC. I can start WiFi from the OSMC page (“My OSMC”->“Network”->wireless) and it seems to be working. However if I reboot, the WiFi connection does not restart. I can manually restart it, but that will not work in general, I will need WiFi when I move the Pi to my TV area.
As long as I don’t reboot I can also SSH into the Pi thus I know that the WiFi connection is working.
Also, I don’t see where I can reset the password if someday I should be changing it.