Hi Tomas,
I looked into this and the best that I can determine is that I never implemented this feature, only the setting for it. I'm sure I had it on my priority list at some point but over time it drifted off my radar because I'm not using hashed passwords on sites I manage.
I've added it again to my to do list, but honestly its not my top priority, I'll try to get to it in the next month or 2, but I'm not going to let it divert me from things I'm already focused on.
If you or your company need it urgently and would be willing to sponsor development (I estimate development and testing at 20 hours and would give you an open source sponsorship rate of $45/hour = $900), then I would be willing to switch gears and give it top priority.
Best,
Joe