I ran into this issue a few times before.
A passworded rar file is stuck (I use the new {{password}} feature) as if there is no password.
i try to unrar manually via NBP, and I select the right password, but it just fails.
WinRAR works just fine...
This doesn't happen on every file, it seems to be specific to particular RAR types.
How can I diagnose this and help out?