Just updated to 0.36 and now have all the lights in my house going nuts - cycling on and off. If I look at the logs I see a lot of crashes.
Also all the light components have changed in the GUI to a simple “on” or “off” and not a toggle like that had been, but switches are still a toggle.
0.36 won’t even start for me and spits out a lot of errors on startup. Something is wrong there so I have gone back to 0.35.3 until it sorts itself out 
It will be hard to help you without knowing which light you’re using?
And could you post those crashes log entry?
There is a known fault with 0.36.0 that is effecting many users https://github.com/home-assistant/home-assistant/pull/5355
I’d say once that gets fixed your issues may be fixed as well.
I’ve rolled back to 35.3 and will wait for the .1 on 36 before I move up. Don’t have time right now due to work schedule to debug and wife gets upset when home isn’t working…