Cloud9 should sync which directories are expanded/collapsed, and open them automatically the next time I open my workspace.
Sorry, I’m not sure what you mean.
It sounds like you want to be keeping the same folders expanded when you re-open the IDE or open it on another system?
Because we already do that, I just checked on your workspaces as well, and they have folders open still from last use.
Do I have to keep the workspace open for a specific amount of time in order to get this saved?
Looks like there is a regression: state is saved only after collapsing a folder.
Thanks for reporting!