If c2 is open for extended period / or if lots of work has been down in small period, it gets sluggish, it either crashes - very irritating. Or, if you close it which seems to speed it up again if it is sluggish, it crashes, won't close etc.
I think this is great software, it is just very unstable at the moment.
I hope they find the gremlin soon.
You think you can do these things, but you can't, Nemo!
Just keep reading
Just keep learning