Disabling build failed balloon

Having not used CLion for a while, I have just returned to it and found some odd behaviour that's been added during my absence. Currently the most annoying is the build failed popup balloon that I can find no way of disabling… I can see it's failed from the messages, why do I need another persistent popup telling me the same thing.

I can't see anything obvious in the Notifications section etc for controlling the behaviour, so I'm probably missing something obvious… can anyone shed any light on this?

Thanks

/nick