All day today I am having problem with C9 UI not being responsive - often after I run a simple command from the terminal, CPU shots up to over 200% and I have to wait for 5 to 15 min for the UI to respond. Terminal hangs and files can not be saved. Is anybody having this issue?
Is this only affecting one workspace? Could you try cloning it and seeing if it affects the clone as well?
I created a brand new workspace and all works as desired.