Under certain circumstances, FB gets confused about the correct FTP Connection to use in the FTP actions, and erroneously reports "Not connected" for those actions. Closing FB and re-opening makes the problem go away, so I personally don't view this as a high-priority item, but I did waste some time diagnosing, and it may be a symptom of larger issues.
Repro steps:
1. Create a simple set of FTP actions, e.g., FTPConnect -> FTP List Directory - FTP Disconnect. Make sure they work.
2. Create a second set of similar actions, but use the same FTP Connection Name. Click 'Run'. FTP reports an error/warning to the effect of duplicate connection name.
3. Delete the second set of FTP actions. Re-run.
Expected: 1st set of actions runs successfully
Actual: 1st set of actions report "not connect" and fail.
4. Close FB and re-start. Problem goes away.