Using 1.7.54g on a Shield TV (not gone to experience 8.0.1 yet as need to check 4OD etc works) I get it not complete the refresh rate switch back. I get a black screen, have to switch out to another input and then back tio Shield. It then causes it to crash and go back to the home screen.
It was running well and I couldn't say if its 54g that is causing it or not. I will test on my Sony TV which is also ATV.