I noticed that some games don’t work when launching from within LB. What happens is that you just see a black screen.
This happens for example with the Mortal Kombat games, but for example Killer Instinct launches perfect.
I did test another launcher to see if it’s an issue within LB and I guess it is as when I used a different launcher it just works.
Edit: It does launches RA but looks likes to be not responding. Can only force quit it as any other button combination doesn’t work.