It should work if you make sure the new name has no underscores or dashes in it. I just spent an hour realizing this when I created databases lp and then lp_wp, and all kinds of things went haywire when I tried to add lp_wp (including the endless 'Processing...').
So, the defect is that either the underscores should be allowed, or the user should be notified that names can't contain them. But at least avoiding the underscores for now you can continue working.